I chose yes. I'm an atheist, and I've found that no matter how much I'd like to pretend it doesn't matter, it
does. I have strong opinions about organized religion, and I'd feel pretty uncomfortable dating someone who adamantly disagreed with me. I have plenty of theist friends, and that has never been a problem, but when I once dated a theist guy, there were a few awkward exchanges, including one with his overzealous mother!
Since then I've tried to stick with non-churchgoing type like myself. Everyone is more comfortable that way.