I've known only a few atheists but the ones I've known have all been moral, upstanding, kind people. Far better behaved toward others in general than their Christian counterparts.

It's gotten to the point where I'm far more likely to trust an atheist to behave properly than a self proclaimed Christian. The people that have come up to me and told me they are Christian tend to be the ones that want to convert you, forcably if need be. ;-p