Well, Skyrim was actually sold out everywhere for PC on launch day, but I did manage to get my hands on it on Monday (normally, I'd just get it from Steam or something, but I really wanted a case to go next to Morrowind and Oblivion). Steam informs me that I've put 19 hours in, but I'm really enjoying it. It's definitely an improvement on Oblivion, as it feels more real and alive. There's more of a Morrowind feel to it. Personally, I think it looks gorgeous as it is (it's not on the level of the Witcher 2, but I think any complaints from reviews are invalid, particularly as the artistic style is varied and done well, though I'll certainly be applying some graphical improvement mods in the coming months).
The new levelling system makes much more sense, and I'm glad I don't have to deal with the headache of figuring out what to level in order to maximize attributes anymore. The lack of level scaling is also great. Sneaking and archery is working much better for me than before (so much so that I regret playing as a Nord, and wish I'd switched to Dark Elf or Argonian) and duel wielding is fun.
Dungeons and caves feel much more unique, the bigger quests have all been quite well done. But what I'm really happy about is hovering the mouse over an cave or fort icon will tell you if you've been there and cleared it, which was perhaps by biggest issue with Oblivion as I could never remember if I'd been inside something or simply discovered it.
Also, very impressed with the compression technique they used. These 20gb games are going to fill up my hard drive far too fast...it's nice to see a AAA game with less than 10gb.