I've always chosen my band members based on their sense of humor. It might sound stupid but it means not only are they fun to live with on a tour bus for years but humor implies intelligence.
My fear is that I go up to the girl of my dreams and say 'I'm sorry but I've got to say hello to you ' and she slides the stool back and gets up and walks away saying 'Not for me Bub. I don't want anything to do with you.'