Like zombies in Oblivion.
My memory of Oblivion is a little disrupted due to a lot of mods I installed.... but I recall ghosts, wraiths, zombies, skeletons,rates, goblins and vampires. Skyrim has all of those, (or slight variants anyway) but the problem is you see draur's a lot more. Falmer are goblins, draugr are zombies, skeevers are rats, there are ghosts but hardly any and skeletons are so weak you can't remember them, and falmer are very rare.
It's about the same, but I think Oblivion got the variety a bit better, and I liked the zombies. I wish we had plain zombies like Oblivion once in a while and they give you attribute damage. That always made me OH CRAP when they were coming because I'd have to go find some rare potion to cure whatever they gave me and switch to destruction or bows to kill them because I was scared of their diseases.