I like both. I guess Morrowind is more atmospheric one. Of course, Oblivion has better graphics, but it doesn’t make any sense for me coz I don’t believe that world is real.
My favourite MMO is a game where I can live like at real life. I want to eat food and wear nice clothes (not Sims Online! :P), to talk to really interesting people, and not only about trading, but also about things that happen around at the virtual …