I like anything involving the male chorus: the word wall chant, level-up shout, "Dovahkiin, Dovahkiin" song, etc.
I've only been getting into alchemy recently because of my blog (before that, I'd pretty much ignored it for hundreds and hundreds of hours of gameplay), but I find the clinking and bubbling sort of soothing.
I like the critical hit/sneak attack sound, although I can certainly understand why it annoys the hell out of some.
The spider-scuttling sounds are creepy but I don't actively dislike them. Bears themselves are annoying but I don't mind their roars that much. (I might think differently if I played with headphones: they'd probably scare the crap out of me.)
I think my least favorite sound is the "oof!" a male character makes when stepping on a trap, getting hit hard, etc. It just sounds ... bad. I've made a lot of characters, all very different from each other, and each time I hear that sound I have a WTF moment. (Really? I sound like that?)
I'm also wondering whether there's something wrong with my brain: whenever my character absorbs a dragon soul, there's this bit near the end of that sound that sounds like ... high pitched .... chickens clucking? I don't know how else to describe it. I wonder whether anyone else hears this or whether my brain decided early on to interpret the sound this way and how I have no way of undoing that weird bit of wiring. Where are all of these tiny chickens hiding?