In all seriousness, I have played and modded each TES extensively and with the right mods, Oblivion is the best of the lot. The sad thing is, when you dig into Oblivion construction set, the code for an excellent RPG is in there. For example, there are settings that forbid potion consumption depending on alchemy skill, there are settings to reduce stamina while running, making it more of a intrinsic mechanic as in Morrowind, there is a dialogue tweak to turn enemies hostile if you taunt them enough. Wolfs and other predators don't hunt deer in the base game, but with a single tweak, deer become prey as they're supposed to, making a more dynamic world. There's a ton more stuff right there in the CS, but Bethesda decided to nuke all this potential nuance for no reason whatsoever.