I used to get a lot of people telling me I was an atheist because I either didn't want there to be a god or because I wanted the universe to be logical (granted, I do want that, but they meant it in the pejorative Vulcan-y sense). I eventually shut them up with "who doesn't want to believe they're going to heaven?" but it took me a while to come up with that one.

I don't understand it either, but this is a thing people say a lot.