What do you mean oblivion was replay able? It was not like there was much to miss on the first play through. Oblivion gave us that rather lame quest system where people did not even need to read anything. Had no role play what so ever. Talk to random npc hit 1 alot then go to the nice shiny waypoint marker on your compase. Kill mob or grab item. Return to quest giver and repeat. I hope they bring back the actual quest system from morrowind and daggerfall. I do not want another baby's first rpg like Oblivion/fallout. 1 was bad enough let alone 3 games that was a cake walk. It was less of a game and more like a long interactive movie. There was no exploring. There was no roleplay. It was just this badly made game that people who can not read loved to death. I want to be exploring the world. Finding dungeons. Spending countless hours tring to complete said quest. Not spend 60 dollars on a game I will beat in a few hours.
I've probably spent hundreds of hours, on dozens of characters, in Oblivion. A bit less in Fallout 3. And only one play of Fallout:NV, because it was so damn
linear, for all that it's quest structure was more "complex" and had more "roleplay" options. I play gamesas games for the world. And the world in OB & FO3 was interesting, and open (you can just pick a direction and go!), and has plenty of space to screw around in.
(Now that I think about it, I think I've only actually finished the MQ once in OB and twice in FO3 - had to do it again for Broken Steel; most of my OB games, I don't even start the main quest, because I don't want to clutter the landscape with Oblivion Gates.)
Different strokes for different folks, I guess.