I assume we're just talking about getting a date and not a long term relationship.
1. You must not be stupid
2. You must be tolerant of other people; bigotry or hate of any kind is prohibited.
3. Be Clean - soap is your friend.
4. Treat me with respect
5. I think that everyone wants a sense of humor so it's not a terribly personal characteristic when I say it.
6. Nerds are preferred. (if it were a long term thing it would be a must)
7. Don't be all macho and tough, but not a wuss either
8. Must be able to drink casually - its usually hard when one person drinks and the other doesn't
9. Likes to go out and play or stay in and just chill
10. I have no racial preferences - I like all the flavors in the box.
11. Don't call me 'cute' I get it all the time and it drives me nuts. Babies, puppies and kittens are cute
As far as physical characteristics go...
Men
I like men that are larger than I am; which isn't hard since I'm 5'4". Some level of fitness, you don't have to bench or run or stuff like that. I prefer dark hair, and facial hair. Oh I love me some facial hair, if I don't think a guy is attractive, just let him grow a goatee -- I like it so much it's almost embarrassing! Must be able to be sweet and affectionate when the occasion calls for it. I like guys who aren't too concerned with what people think is manly and all that crap. A nice butt helps. Must be able to handle that I like women.
Women
Can be taller or shorter than I am. Can be skinny or fairly plump but an athletic woman would be ideal. Short or long hair - preferably dark. Either butchy or girly or anything in between so long as she's friendly and fun to be a around. About those bewbies, just enough to grab. I like curves. Must be able to handle that I like men.