I need a full set of relatively well kept teeth.
That, by far, is the most important thing to me. If you're missing teeth, or they're all fucked up, then I can't deal with it. I don't need PERFECT teeth, but they gotta be there and be where they belong.
After that, I need a girl's top to be larger than her bottom, or at least roughly the same size. No pear shapes. That's a little brutal but... whatever. I don't mind a little chub, or even a lot of chub, but no webeloes (they wobble but they won't fall down).
Those are the physical requirements, and once those are out of the way it comes down to personality and intelligence. I like a smart girl, I NEED a smart girl, I need someone that will challenge me and tell me when I'm wrong and then prove it to me, that turns me on like nothing else. Shared interests are nice, but not required beyond an interest in film and literature and a taste in movies that isn't fucking painful.
Personality wise, the girl can't be evil. I need to be with someone that shares at least the same rough outline of my system of ethics. I can't deal with ANYONE that is a total asshole/**** so I certainly couldn't handle being with someone like that.
All that said, to be perfectly honest, I am also attracted to partially broken/totally damaged girls. I assume this is to avoid dealing with my own problems as I deal with theirs. It's one of the major reasons I've sworn off relationships until I meet someone truly special.