In my opinion, Skyrim world feels more "alive" than Rivellon, but quests are better in Divinity.
I agree, I found the quests in DKS to be more engaging, specially the side quests. Also there is a good deal of humor (sometimes dark humor!) present in the dialogs. The main difference between these two games IMHO is the freedom granted by Bethesda. Tamriel's world is more engaging than Revellon's. I've been playing the Elder Scrolls games from Morrowind and in every sequel I felt the world to be immersive which gives you the feeling of being a part of it. Sadly in DKS, I didn't get that feeling and it's not about the size or scale of the game. From what I know Divinty series of games also have a long history and legacy and I sure hope Larian makes good use of that to create a true engaging universe in their next title.
(main quest in Skyrim has lots of potential, but wasn't used as well as could be)
That was the case with TES:III and IV too, great storylines with much potentials yet failing to deliver on the promise. I believe this has to do with Bethesda's approach where the main quest comes second to the game-world and character design. I also never liked their "prophesy's champion" approach where the player has no choice but to follow an almost liner storyline. But the open and sprawling world, full control over almost everything and most importantly the ability to mod offsets whatever deficiency the main quest has.
