What kind of anime hair do you like?
Hime Cut>all hair styles
Ponytails, or twintails.
If they are ponytails, the longer the better, with twintails is the opposite.
Natsumi's hair is top tier. It's impossible, yet hot as hell. Hair with asymmetric attributes is also a major plus. Minor accessories are cute as hell like small ribbons or hair clips.
Also a major plus: hair cut short as a result of character progression. Examples: Ange and to a lesser extent Korra if you count that.
Lets /thread this thread. Braid over shoulder is perfection and won't be beaten. Only thing that comes close is
Haruhi's pony tail.