Elder Scrolls IV: Oblivion has an amazing predecessor in Elder Scrolls III: Morrowind. The true RPG of RPGs in every sense of the word. With the upcoming release of its latest installment the PC world is a buzz with once again diving into a massive world for us to be as good or bad as we want. I for one hope thieving is just as fun as it was in Morrowind. Check out the preview at Gamespy.
UPDATE: I just read through the article, amazing what the dev team plans to do with the AI of the individual NPCs. Some of them having classes on thier own, they will thieve, hunt, completly on their own. Wow.
Source: [url=http://pc.gamespy.com/pc/the-elder-scrolls-iv-oblivion/558955p1.html?fromint=1]Game Spy[/url]