WIldhammer Dwarf. But then how would we change our existing toons without paying for it?
I think I will just like them to update current models. Mainly human males. Tired of having to wear facial hair to hide the fact that they look insanely angry without it.

I have a troll for a main toon, and let me tell you, if I could pick a tribe of trolls to be from that dictated either skin color, hair, decorations and maybe even voice, I'd love it.
(Blue Frost DK Ice Troll FTW!)

Better yet with all the different skin colors for many druid races I think their skin color or hair color should dictate the boomkin color. There's so many variations out there, I think a blue boomkin would be rather fun. :)

"But then how would we change our existing toons without paying for it? "

Ever heard of free stuff? Well, if you've played only WoW, of course you haven't... Recently EvE Online had a major character overhaul - from a cartoony bust figure to a whole body uncanny valley thing. And we got to redesign our characters - for free! And we got a plethora of customization options from tens of hairstyles to tattoos to piercings, not to mention almost entirely malleable character creation from obese to anorexic bodytypes - also, for free!

Do you think it _really_ costs 20 something dollars/euros to run the character recustomization process in WoW? Heck, for all we know there is either a dude flipping a switch, which in fact would make sense to how supposedly obscenely costful this process is, or it's a completely / 99% automated process for flagging a character for recustomization. Blizzard could give away free character customization for some momentous event, I'm 100% sure, but they won't.

@ Marcosius

I think I don't care what Eve or Rift does. I play WoW.

@Noyou: Wildhammer dwarves would be somewhat simple -- Blizz could add tattoos to the existing skin options in the game (or allow them to be added via the barbershop -- the thought of Gnomish/Goblin Auto-Tattoo Embedders is simultaneously a horrifying and hysterical idea).

For that matter, adding tattoo options to all the races would be awesome.

"But then how would we change our existing toons without paying for it?"

Well for Wildhammer Dwarves, one can simply add a category for "tattoos" which are customizable at the barber shop as the Nelf ones are.

As for if Blizz ever reworked the character appearance for all races in general (say improved graphics), I imagine a one time free recustomization should be done for already existing characters to redesign the appearance based on the changes Blizz made to character appearance.