I want a partner who isn't overly impressed by bicycles. Someone who rides to work, rides to the bar, but isn't going to get all bike snob on my ass or repeatedly buy innapropriate bike parts (adjustable angle stems, stupid light wheels, wrong size frames) and ask me to make them work. Few things suck worse than riding with someone who acts hurt if you drop them and gets offended if you take it easy.
I would take a dancer over a messenger any day. rule #12.