Free Will -- the "materialist string" pulls both ways.

[ErGingerbreadMandude]

I can be just as bad as I'm good.
I always have a choice.

I would argue that you don't; rather, I would argue that you are incapable of doing evil things, such as robbing banks, kidnapping little children, torturing animals, etc.  I would cite as evidence the fact that individuals who do such things, without exception, have deficiencies within their brains and/or past environments which has a direct and discernible causal link with their present behavior.  These correlates can be demonstrated using statistical methods.

You would argue that I wouldn't be capable of doing evil things and base your belief of the non existence of free will on that?

Yeah, good luck with that.