As a non-believer, I have a very good sense of right and wrong. I did have a Christian upbringing, so there's no doubt that influenced that. I see nothing wrong with the teachings of Christianity, just the misguided bullshit around it. Except the turn the other cheek thing....just can't get behind that.
I believe in being a good person. I like to help others because it makes me feel good, and not because it's supposed to buy me an afterlife.