Developers. Designers. Totally different breeds, but what can you do, sometimes they have to work with each other.
I was talking to a friend yesterday about a talented but very quirky designer and decided that the stereotypes are actually backwards. Developers are generally accepted as the weirder of the two, but from my experience the socially inept, overweight, and smelly developer is the exception rather than the norm (although I do know a guy who only wears orange shirts).
On the other hand, I think designers are let off the hook more because they can excuse everything as artsy. But I've been around some that don't look you in the eye or get super emotional about their work.
So who's weirder? Discuss and share some funny stories :)