Maybe I'm shallow, and maybe its subconscious, but I've never dated anyone, vanilla or otherwise, who I didn't think I could take in a fight. I like 'em skinny and weak- or maybe its just that little guys tend to have the more submissive personality that I'm attracted to. Oh, and I've never been with a man who was older than me. That just wouldn't work out.
Seriously though, though I think looks play a part, personality is so much more important. Everything we are here is based on personality- whether you're Dominant or submissive is based solely on personality, and of course that is truly what matters.