From my point of view it has more RPG elements than Oblivion, various quest solutions, different ways to play your character, consequenses in the world(either people love you or hate you, actual reactions from people), you can have an effect on the world such as killing people and taking over their shops etc. And yes, I like to poke and prod people into thinking differently, more often than not it ends up with a long discussion, hehe.
With that said, I still don't think it's a great game, but the few hours it lasts are fun enough.