My preference is less emo than the ladies below me (no offense to them). . .
I like when a guy's hair is just natural. On the shorter side, but that's it. Don't dye it or put a bunch of products in it. You know how some guys have hair that won't lie flat in the back? I think that's adorable. So are curls sticking out from under a hat. They get my attention more than a guy who clearly spent two hours on their "I don't care" look.