It Depends on who あなた ask >.< to me i <3 Louies hair, But thats coz He my favorite. And dont call me a Directionater just coz i have a fave. Its ok to have a fave as long as あなた still 愛 and support the rest of them :D
I think Harry has the coolest hair because it curly, long, and it looks soft. I.wish i can play if it. It looks fun to play with his hair mess around with it.