All of the Daedric quests I've done have been cool, the entirety of the Dark Brotherhood was awesome. My brother is playing right now so I can't look at all of my completed quests and rattle some more off. Plus the dungeon design is excellent, I feel like every dungeon I enter is unique, and has something new to show me.
And scaling hardly removes the sense of growth, when in the beginning of the game I could hardly kill a Restless Draugr, now I basically one shot them. Then I have to fight a Scourge, or a Death Lord, and things get interesting.
Oh, and, thanks to radiant story, the world is never static. It's dynamic, and I never feel like I'm grinding through the same enemies, or meeting the same NPCs on every character. Plus the combat is fun, definitely a step-up from oblivion.
Lets see, mephela is getting a key, boethia kill generic bandits and their leader, hircine, kill wrewolf, dagon, raid forts for dagger, meridia kill necromancers in dungeon, molag bal free guy from generic dungeon... List goes on.
Now the ones in Oblivion werent great, but these werent that great either, pretty dull imo.
DB was horrible, worse than oblivion's DB.
So what there isnt growth! All thy do is rank up enemies, all those lesser drauger are now restless, the restless are now deathlords, its the same damn thing as if you were just starting. Look at FNV, I found deathclaws at lvl 2, I went back, still deathclaws, they didnt become alpha deathclaws, and the alphas didnt become legendary deathclaws. I fight them at lvl 2 get my ass kicked, at level 30, I kill them all, thats growth. In skyrim at thestart I 1hited lesser draguer and didnt with higher, now the higher from before are lesser, and a new group of higher are out of nowhere.