I have similar feelings about this. There are billions of people on the earth and hundreds of millions of them are cool. So, why waste time with people who aren't nice when there are so many nice people to meet?
If I'm looking for someone to go to a bar with, I'll pick the nice person. If I need someone to help me complete a project at work, I'll probably try to find someone who's good at what they do, regardless of whether they're an asshole or not.
ymmv, and all that, of course.