I finished Oblivion! Like, beat every faction quest, and all the DLC, and Shivering Isles (which was AMAZING by the way), and even a few user-created mods like Lost Spires and some Vampire Realism mods. I got to a point where I could kill people by not attacking because I had damage and spell reflect enchantments so powerful that, in combination to various resistance enchantments, no damage would be incurred to me, and most of it would be reflected back to my attacker. I got to the point where turning the difficulty slider up only made battles last an eternity because neither me nor my enemy would take any damage.
Now I can finally be productive and do other things, like eat, and work out, and write music, and sleep!