1. Does human suffering play a big part in you considering yourself an atheist?
2. Do you believe in free will?
3. Do you believe in personal responsibility?
1. No. I just have no proof of a God. That is all.
2. Free will, if by that you mean there is no divine power deciding what we're going to do. And I definitely believe in responsibility for one's actions.
But I also believe that humans, social systems and gender et al have significant influence on the ability for persons to make choices.
Eg, I do not believe that women in Saudi Arabia have much choice but to become fundamentalist Muslims, even though that religion works against them.
Same thing with a young kid growing up in a bad neighborhood. The chances are much higher that he will become a criminal. Because that are where his opportunities lies.
3. See above.