As a die-hard Oblivion hater, I must admit that there is absolutely nothing wrong with Skyrim.
20 hours in and no bugs/glitches found, varied dungeons, stunning graphics, sidequests are quite interesting and fleshed out, improved leveling system (although purists may disagree).
Every couple of hours, I think about MW3 and that I'll pop it in later on, but I just can't get myself to swap discs and leave Skyrim.