My question, why do we choose to sin? I hear so many people claim we can stop sinning and yet we don't stop. If it's a choice to sin then is not our choice influenced by our sin nature, and how are we free from the bondage of sin if we keep on sinning?
No it is not because of any sin nature! There is pleasure in sin for a season. Sin can be pleasurable. It does not take a sin nature to sin. That is part of the false teaching going on today. We are beings that have been created with the ability to enjoy things and freely choose good or evil. The problem is how or when we enjoy it.
We are allowed to have sex but not outside of marriage. In the garden man was allowed to eat but not from a certain tree. Eve saw the tree was good to eat and pleasant to the eyes and she did eat. She had no sin nature to help her sin. It was a free will choice just like it is for us all.
And when the woman saw that the tree [was] good for food, and that it [was] pleasant to the eyes, and a tree to be desired to make [one] wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat. Our sins are just as sinful as was theirs.
I fear you are looking for a way to not take full accountability for your sin by claiming a sin nature. God's word teaches all sin is a willful choice and no one has to sin.
There hath no temptation taken you but such as is common to man: but God [is] faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear [it].
That passage alone puts all the blame on us just like all the blame was on the first couple.