Both inside and out :)
Most Helpful Guy
Mental: Serious, fun (I know it's hard to get those two together), smart, mature, classy, romantic, experienced, realistic, honest, strong, and independent.
Physical: I don't know how to describe it, but I'm a sucker for girls that have the classy and elegant beauty to them. I don't dig cute girls. I mainly care about the face. As long as her body is decent and her face is at least a 9/10, I'm good.
Usually the girls I'm attracted to are introverts, because I very rarely find any extroverts with these traits, but aren't too masculine.1