Morrowind was more impressive atmospherically because it was fresh, a new perspective on an rpg realm, but Oblivion takes the old and the new of generic and moderately original and makes it into the fanciest looking (provided your comp can handle the stress of it's graphics on high) rpg to date, and darn fun to play too. But, like you said, if you're looking for the innovative and the undone, don't expect something incredible. Cyrodiil is your typical metropolitan rpg realm.
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