Do we have a sin nature? Lets see what God's Word has to say about it.

Do we have a sin nature? Lets let God’s word speak about that.
Ephesians, chapter 2
[1]: And you he made alive, when you were dead through the trespasses and sins
[2]: in which you once walked, following the course of this world, following the prince of the power of the air, the spirit that is now at work in the sons of disobedience.
[3]: Among these we all once lived in the passions of our flesh, following the desires of body and mind, and so we were by nature children of wrath, like the rest of mankind.
[4]: But God, who is rich in mercy, out of the great love with which he loved us,
[5]: even when we were dead through our trespasses, made us alive together with Christ (by grace you have been saved),
[6]: and raised us up with him, and made us sit with him in the heavenly places in Christ Jesus,
[7]: that in the coming ages he might show the immeasurable riches of his grace in kindness toward us in Christ Jesus.
[8]: For by grace you have been saved through faith; and this is not your own doing, it is the gift of God --
[9]: not because of works, lest any man should boast.
[10]: For we are his workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them.
[11]: Therefore remember that at one time you Gentiles in the flesh, called the uncircumcision [12]: remember that you were at that time separated from Christ, alienated from the commonwealth of Israel, and strangers to the covenants of promise, having no hope and without God in the world.
[13]: But now in Christ Jesus you who once were far off have been brought near in the blood of Christ.
[14]: For he is our peace, who has made us both one, and has broken down the dividing wall of hostility,
[15]: by abolishing in his flesh the law of commandments and ordinances, that he might create in himself one new man in place of the two, so making peace,
[16]: and might reconcile us both to God in one body through the cross, thereby bringing the hostility to an end.
[17]: And he came and preached peace to you who were far off and peace to those who were near;
[18]: for through him we both have access in one Spirit to the Father.
[19]: So then you are no longer strangers and sojourners, but you are fellow citizens with the saints and members of the household of God,
[20]: built upon the foundation of the apostles and prophets, Christ Jesus himself being the cornerstone,
[21]: in whom the whole structure is joined together and grows into a holy temple in the Lord;
[22]: in whom you also are built into it for a dwelling place of God in the Spirit.

Romans, chapter 5
[1]: Therefore, since we are justified by faith, we have peace with God through our Lord Jesus Christ.
[2]: Through him we have obtained access to this grace in which we stand, and we rejoice in our hope of sharing the glory of God.
[3]: More than that, we rejoice in our sufferings, knowing that suffering produces endurance,
[4]: and endurance produces character, and character produces hope,
[5]: and hope does not disappoint us, because God's love has been poured into our hearts through the Holy Spirit which has been given to us.
[6]: While we were still weak, at the right time Christ died for the ungodly.
[7]: Why, one will hardly die for a righteous man -- though perhaps for a good man one will dare even to die.
[8]: But God shows his love for us in that while we were yet sinners Christ died for us.
[9]: Since, therefore, we are now justified by his blood, much more shall we be saved by him from the wrath of God.
[10]: For if while we were enemies we were reconciled to God by the death of his Son, much more, now that we are reconciled, shall we be saved by his life.
[11]: Not only so, but we also rejoice in God through our Lord Jesus Christ, through whom we have now received our reconciliation.
[12]: Therefore as sin came into the world through one man and death through sin, and so death spread to all men because all men sinned --
[13]: sin indeed was in the world before the law was given, but sin is not counted where there is no law.
[14]: Yet death reigned from Adam to Moses, even over those whose sins were not like the transgression of Adam, who was a type of the one who was to come.
[15]: But the free gift is not like the trespass. For if many died through one man's trespass, much more have the grace of God and the free gift in the grace of that one man Jesus Christ abounded for many.
[16]: And the free gift is not like the effect of that one man's sin. For the judgment following one trespass brought condemnation, but the free gift following many trespasses brings justification.
[17]: If, because of one man's trespass, death reigned through that one man, much more will those who receive the abundance of grace and the free gift of righteousness reign in life through the one man Jesus Christ.
[18]: Then as one man's trespass led to condemnation for all men, so one man's act of righteousness leads to acquittal and life for all men.
[19]: For as by one man's disobedience many were made sinners, so by one man's obedience many will be made righteous.
[20]: Law came in, to increase the trespass; but where sin increased, grace abounded all the more,
[21]: so that, as sin reigned in death, grace also might reign through righteousness to eternal life through Jesus Christ our Lord.

Romans, chapter 6
[1]: What shall we say then? Are we to continue in sin that grace may abound?
[2]: By no means! How can we who died to sin still live in it?
[3]: Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death?
[4]: We were buried therefore with him by baptism into death, so that as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life.
[5]: For if we have been united with him in a death like his, we shall certainly be united with him in a resurrection like his.
[6]: We know that our old self was crucified with him so that the sinful body might be destroyed, and we might no longer be enslaved to sin.
[7]: For he who has died is freed from sin.
[8]: But if we have died with Christ, we believe that we shall also live with him.
[9]: For we know that Christ being raised from the dead will never die again; death no longer has dominion over him.
[10]: The death he died he died to sin, once for all, but the life he lives he lives to God.
[11]: So you also must consider yourselves dead to sin and alive to God in Christ Jesus.
[12]: Let not sin therefore reign in your mortal bodies, to make you obey their passions.
[13]: Do not yield your members to sin as instruments of wickedness, but yield yourselves to God as men who have been brought from death to life, and your members to God as instruments of righteousness.
[14]: For sin will have no dominion over you, since you are not under law but under grace.
[15]: What then? Are we to sin because we are not under law but under grace? By no means!
[16]: Do you not know that if you yield yourselves to any one as obedient slaves, you are slaves of the one whom you obey, either of sin, which leads to death, or of obedience, which leads to righteousness?
[17]: But thanks be to God, that you who were once slaves of sin have become obedient from the heart to the standard of teaching to which you were committed,
[18]: and, having been set free from sin, have become slaves of righteousness.
[19]: I am speaking in human terms, because of your natural limitations. For just as you once yielded your members to impurity and to greater and greater iniquity, so now yield your members to righteousness for sanctification.
[20]: When you were slaves of sin, you were free in regard to righteousness.
[21]: But then what return did you get from the things of which you are now ashamed? The end of those things is death.
[22]: But now that you have been set free from sin and have become slaves of God, the return you get is sanctification and its end, eternal life.
[23]: For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.

Romans, chapter 7
[21]: So I find it to be a law that when I want to do right, evil lies close at hand.
[22]: For I delight in the law of God, in my inmost self,
[23]: but I see in my members another law at war with the law of my mind and making me captive to the law of sin which dwells in my members.
[24]: Wretched man that I am! Who will deliver me from this body of death?
[25]: Thanks be to God through Jesus Christ our Lord! So then, I of myself serve the law of God with my mind, but with my flesh I serve the law of sin.

Romans, chapter 8
[1]: There is therefore now no condemnation for those who are in Christ Jesus.
[2]: For the law of the Spirit of life in Christ Jesus has set me free from the law of sin and death.
[3]: For God has done what the law, weakened by the flesh, could not do: sending his own Son in the likeness of sinful flesh and for sin, he condemned sin in the flesh,
[4]: in order that the just requirement of the law might be fulfilled in us, who walk not according to the flesh but according to the Spirit.
[5]: For those who live according to the flesh set their minds on the things of the flesh, but those who live according to the Spirit set their minds on the things of the Spirit.
[6]: To set the mind on the flesh is death, but to set the mind on the Spirit is life and peace.
[7]: For the mind that is set on the flesh is hostile to God; it does not submit to God's law, indeed it cannot;
[8]: and those who are in the flesh cannot please God.
[9]: But you are not in the flesh, you are in the Spirit, if in fact the Spirit of God dwells in you. Any one who does not have the Spirit of Christ does not belong to him.
[10]: But if Christ is in you, although your bodies are dead because of sin, your spirits are alive because of righteousness.
[11]: If the Spirit of him who raised Jesus from the dead dwells in you, he who raised Christ Jesus from the dead will give life to your mortal bodies also through his Spirit which dwells in you.
[12]: So then, brethren, we are debtors, not to the flesh, to live according to the flesh --
[13]: for if you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body you will live.
[14]: For all who are led by the Spirit of God are sons of God.
[15]: For you did not receive the spirit of slavery to fall back into fear, but you have received the spirit of sonship. When we cry, "Abba! Father!"
[16]: it is the Spirit himself bearing witness with our spirit that we are children of God,
[17]: and if children, then heirs, heirs of God and fellow heirs with Christ, provided we suffer with him in order that we may also be glorified with him.

No we do not have a sine nature. We are not "better looking sinners."