I mean, sure the game has its flaws, but the whole idea of a daedra invasion seems more interesting to me. The atmosphere was great, and the factions (and the main quest imo) are better and more interesting. Sure Skyrim has better graphics, but I think Oblivion was a deeper game. Anyone else agree?
Considering Oblivion in vanilla (unmodded) state? I'd much sooner return to vanilla Morrowind. Vanilla Oblivion svcked imho. For me vanilla Oblivion was a much much worse experience then Skyrim, It annoyed me to hell for various reasons. But to each their own. Personal tastes are highly subjective.
With mods it's another matter. I still play both modded Morrowind and modded Oblivion. Both, with mods, eat Skyrim in it's current state for breakfast imho.
That said, I am having a blast with Skyrim, even though it's far from perfect and even though there's so much Beth could have done better. Once the CK is out mods will undoubtedly fix what needs fixing, besides adding massive amounts of content, and in the end I do believe mods will make Skyrim rule.