It's funny how when people ask "what you find attractive", men almost always immediately assume you mean physical features, and women almost always assume you mean personality traits.
And apparently I think like a woman, because I always consider personality.
Anyway here's a little rule of thumb that seems to have a lot of truth to it:
Reasonable
Interesting
Attractive
Pick two out of three.
In other words, most fun, interesting, attractive people are stubborn, unreasonable and unstable.
Most emotionally stable, reasonable, attractive people are pretty dull.
And most fun, interesting, stable people are unattractive.
Exceptions are very hard to find.