GW2 has a rather good collection of hairstyles, but not actually enough? given how populated the game is now, you see hundreds of players in one map, yet a lot of them having the same hairstyle, kinda makes it boring. hairstyles, although very simple thing (no balance needed, no major content etc...) can make the player experience way better and make them like their characters way more.
I don't think that the current hairstyles are enough at all, especially for humans. Make more Anet please! especially long hair for male characters.