Daggerfall. What? I can't? Okay, fine. Morrowind. Really? Has to be those two?
Well, okay. The two both have their pros and cons to me. Oblivion did a lot that pulled away from Morrowind stylistically, and I feel that Skyrim did step back towards Morrowind in some ways in that regard. It's hard to place my finger on exactly, but it's a god feeling I get about Skyrim. In most ways, really, I think I prefer Skyrim. But at the same time, it has some -glaring- issues that really bug me, first and foremost how much more EMPTY it feels. All the guilds have only one building, half the 'cities' are a handful of shacks, a third of the map is samey boring snowfields. That's one thing that bugs me. Another is just how floatey movement feels, especially on horseback. I can't count how many times I've been riding down a very mild slope only to have my horse shoot off because it's movement speed apparantly surpassed the curvature of the earth + gravity, causing me to go hurtling down a mountain and die.
On the other hand, I like Skyrim's main story more than Oblivion's by... a lot. Oblivion's main quest felt like an MMO storyline, where your character isn't even related to the plot, they just happen to be the guy capable of kicking the most ass who happens to be around to do the plot character's dirty work. Now I'll grant the whole 'Chosen one' thing is not something I'm terribly fond of, but I'll take it over being completely incidental to the entire story. Tldr of this paragraph, I felt like Martin was the 'main character' of Oblivion. Which is kind of bad writing for a video game, I think.
Oh, another thing that bugged me about Skyrim- the master-level destruction spells are hilariously impractical most of the time. They're so slow, -and- two of the three are aoes centered on the caster, -and- you can't move while casting them... And on top of that, the damage they deal is hardly worth the hassle. I usually just stick to spamming dual-cast fireballs.
Oh, and a pretty major thing that bugged me- I'm not really crazy about the entirety of how equipping things to a hand was implemented. Dual-wielding may be in the game, but I can't for the life of me figure out how to make it remotely effective when you can't even block with it and you don't have a lot of options for evading attacks. Likewise, I feel like mixing melee and magic (my normal character build) is pretty weak without constantly using favorites to switch. The thing is, I feel like a lot of headache could have been saved by having a block key instead of right mouse button being block. And then you could have worked in something else interesting with right mouse button where it does do block right now. Like possibly two different types of attacks with two-handed weapons or something.