I haven't played any Elder Scrolls game before Skyrim and only came across Skyrim this past April, but I'd say it's already definitely up there near the top of the list of my all-time favorites. It has everything a good RPG should have, though it could have done better in the story and character department. The thing about Skyrim is it kind of ruined other RPGs for me lol. There's just so much to do, so much detail, custimization and freedom. It makes it feel like going back to another RPG, they lack most of that. The RPG I've played that comes closest is Dragon Age: Origins, but even that isn't quite as grand. That being said, I think Skyrim would go in my top 5 all-time.