I first played Oblivion on PS3. By the time it was released, my PC wasn’t powerfull enough and even if I consider buying a Xbox 360 (Project Gotham Racing 3 and Gears of War looked so good), I finally decided to buy a PS3. It was one of my first games and really enjoyed it. I spent a lot of time playing the game (for my standards), made sidequests, join Assassins, became a Vampire… Lot of stuff to do in a wonderful world. Actually, I never finished the main story. And it was a good port, not like Skyrim (I own PC version of this, of course).
It was incredible coming from PS2 to see the open world and all the region of Cyrodiil. And that was a moment that I will never forget, the first time you exit the sewer and watch the world opening in front of you: