I played Morrowind to death when it came out. I played it once through vanilla and then several times heavily modded. I don't think I would go back and play it again now because I'm sure the graphics won't hold up. But, it was my favorite game for a long time and I have fond memories of staying up all night playing it when I should have been studying.

I played Oblivion, but didn't enjoy it as much as Morrowind. I felt like the cities in Oblivion were all very similar, and it made me miss the diversity of the cities' architecture and culture in Morrowind. Though the assassin guild quest in Oblivion was awesome.