Personally I just want a high pony tail with a bow, shrine maiden style..
But most of these look like a clipping nightmare. A lot of the long hairstyles in the game already clip a lot. Sadly I don't think they'll be adding more hairstyles anytime soon unless they can make money off it. So big support would be needed. There are however a few Really Long hairs you can mod into the game. IE: Yura's hair, Namsoyoos, Yeharas even Ghost npcs. Iiiif you have the know how. But NCsoft would not endorse that.
So if you want these kind of hairstyle raise hell so they'll put em in