I own, but have not played, most of the Just Cause & Far Cry series, and I suspect those probably could earn themselves a spot if I ever played them. And I've never played any of the Rockstar games, aside from about 10 hours of LA Noire, which made me want to never play it again.
For my own rankings, given the other stuff that's on here...do we count Tomb Raider? I suppose I wouldn't, since it's not strictly open (where you can go where you want from the beginning), but it probably blows a lot of these out of the water as a gaming experience.
Otherwise, there are a lot of factors that go into how I feel about these things, and no one game has them all - not even close, really. So I'll just mention the 'winners' for each of those feelings and why they're successful.
- "Pick up, put down, lather rinse repeat" - Fallout 3. By the end game, it's fantastically broken, but man, sometimes it's just fun to go to some location you haven't seen before, blow some shit up, own a Deathclaw or 5, and move on. It has replayability and ease and fun by the bucketloads. And the story is better than 4.
- "I think I know it, and then I find I don't know it" - Skyrim. I have probably 1600 hours in this and about 12 different characters, but each and every single time I play it, I learn something I didn't know on the prior playthrough. The last time it was learning the non-violent option for solving the Gildergreen quest. Always something.
- "I wish I could be in this world" - LoZ: Breath of the Wild. As much as I've dumped on it in the other thread, it just feels...inviting. Like when you glide into some empty area and just look at everything around you, there's a sensation of peace to it all. I'm not sure too many games outside of the LoZ series could pull this off. Ocarina of Time might actually be better at this, but feels more restricted and restricting.
- "This owns my soul" - Morrowind. Forget the bugs, forget the worst combat system in the history of combat or systems, forget the lack of voice acting, forget the age of it. This did deep horror better than any other game I've seen, especially given the plotlines of both Oblivion & Skyrim since. Vvardenfell is such a massively creepy, unsettling, weird fucking place, and when you do totally basic stuff like PICK UP A BOOK AND READ there are just more and more layers of weird and insane and mind-warping waiting for you. There's a huge part of me that wants to set aside the awfulness of the way the game handles to play it again...and then the part of me that's scared shitless of every square inch of that island says, "No."
Anything that puts most or all of these into one container would probably be my favorite game of all time.