I played a bit of Two Worlds the other day, sadly. But noticed something most rpg character creators didn't have.. The ability to adjust the width of shoulders and length of body arms and legs, it would be pretty cool if Skyrim implemented this, I honestly don't see why not, it wouldn't be time consuming or extremely difficult.
Also, I think and option to be able to decide how much muscle or how much fat your character has would be an, overall good thing to add, if possible.. instead of seeing all these perfectly built people around. Sure times were tough but you'd still see some porky nobles. Also a blacksmith should have more muscle than a book keeper...
Actually you can do thats in Oblivion with mods
http://www.youtube.com/watch?v=jluAkUI2Ajs
http://www.youtube.com/watch?v=VZW_3EIlHqk
Thats just scaling of bones + better body mesh thats suit to your chose (bulky, muscular, athletic, scrawny) and I think was already implemented at certain level in Skyrim.
Its more for the Roleplayers. And yeah hopefully also peoples facial colour will match their body colour... anyone ever notice that? Hahaha
Actually there is also some improvements was done by modders look for blanc egt files or check this
http://www.psychodogstudios.com/forums/showthread.php?t=5103