My favorite on a girl is dirty blond hair and blue/green eyes. Oh man if she isn't stuck up, she's like automatically the perfect girl.
Most Helpful Girl
I tend to really like dark hair and hazel-ish eyes on a guy. Not always, it depends a lot on the guy as an individual. I've certainly liked guys with all kinds of different hair/eye combos. But that's the combination I find most appealing, independently of imagining any guy in particular.1