Hagraven... that freaked me out.
Put an arrow into it to stop magicka regenerating, so once I dodged a few fireballs it tried to close the distance. I'm backpedaling, pelting arrows while that wheezing breathing sound gets louder and louder, this thing drawing closer and closer...
So I turn tail and leg it, screaming "Stay away from meee!", huddling behind a rock some distance away to continue the barrage.
Normally I'd go to a sword, but I ain't going near those things.
And yeah, not a fan of the collector quests either. I'll pick stuff up when I find it, but I won't go searching specifically for it. Don't think I've ever finished one of those.