I would love to be able to hide the username from other users and just show the display name only, but I guess trolls would use that against people. I also wish we could change our names at will (or at least for a fee, like in some other games). I really hope they bring surnames back.
Nobody can figure out how to pronounce my avatars' name (rhymes with 'Neo'), and I feel like 'jester' makes it seem like I always have to joke around, lol.