I loved Dune II too. Maybe because I also liked the books very much. It's one of the few games I didn't pass on or throw away after I had played them.
And what about Morrowind? I very much liked the 'cultural diversity' of that game. Every race with its own 'architecture' which looked completely different than the others. Much unlike Oblivion, where everything looks more or less the same.
And what about Dungeon Siege? The only game ever that brought me to tears. Sounds weird but it's true
. I've been playing it on a weekend with almost no breaks, almost no sleep. Then there is that scene, where an elevator takes you out of the mines, you step out and snow starts falling on your head, and sentimental music starts to play.
Unlike DS2 the original also didn't have these boring teleporters (whatever they are called). You were what felt like days in the wilderness, not knowing how far from the next town, or settlement, or hut even. The feeling of 'remoteness' was overwhelming.
And what about Far Cry (as already mentioned), where you constantly think you're on holiday somewhere in the Caribbean
And there are many others I could think of which I would prefer to some on that list.
Something which I find interesting is that I can't play a game twice. I've tried with several and only managed one or maybe two. The problem with games that have a (decent) story is that once I know that story, they kind of become unattractive for me to play again. I sometimes wish I could selectively erase my memory to overcome that problem