Lets see..
-Has to be able to have a conversation with me and understand what I'm saying (I'm into cars, motorcycles and all that, so they have to know some of that stuff to keep up with me)
-Personality/Attitude (this is part sense of humor)
-Has to put some effort into his appearance (I like a guy who's in shape and smell's good)
-Engergy (gotta keep up with me after all
)
Ultimately, I find personality to be the deal breaker in most cases.