Even if you like the UI, why anyone would play this game on PC without SkyUI is beyond me. It's just so much more intuitive, only reason I'm not using right now is because SKSE hasn't updated to a 1.6 version (that I'm aware of... haven't been keeping up with it).
Why would I download a mod for something that 1.) I don't have any issue with in the vanilla game and 2.) from what I've seen via YouTube videos, screenshots, etc... isn't any kind of improvement in my own subjective opinion than vanilla?
If people prefer SkyUI, that's great, but I have no desire to download a UI overhaul when I like the vanilla UI.
Oblivion on the other hand? I don't play Oblivion on PC without Darnified.