I was just playing Oblivion yesterday, since there was that final free piece of DLC that was released a little while ago. I have all of the main quests done, including Shivering Isles, but I'm still working on side quests. My character is kind of insane. I have all of my skills maxed out except for Marksman, as you have to shoot WAY too many arrows to go up levels. For a long time, I was summoning skeletons and other creatures just to kill them and raise my skill. Usually I'm good at playing games in non-fun ways, but even I got bored of that. Ha ha.