This is something that didn't happen in Oblivion. Just about every variety of enemy, from zombies to wraiths to scamps, and even random wildlife like wolves and bears had only one or two variants. Fallout 3 improved this a bit by giving each rank of super mutants 3 or 4 different armor sets and giving feral ghouls different faces and clothing, but it still wasn't anything extensive.
But now the draugrs really have me excited. I'm not expecting the hundreds of different variants you'd get from a mod like MMM, but it looks like Bethesda is really making an effort to give creatures a wide range of appearances.
My question is: Just how many creatures do you think will be varied like the Draugrs are? Will we see tons of different looking giants? Will more complex creatures like trolls, daedra and even dragons have various slightly tweaked models?
*Note- To further clarify, I'm not talking about name/rank variants like "Draugr Warrior/Priest/Overlord" or "Skeleton guardian/hero/champion," I'm asking about purely aesthetic variations.