It's a UNP body with the default underwear option from the UNP female armors page, and the face is just the Pretty Face mod.
No fancy stuff. It's pretty basic. I just took a lot of time to make it look right. I started from the Nord preset #2 if that helps.
And the armor is part of Immersive Armors V7.
Well, there are cases of games (WoW for example) where people refer to vanilla as a pre-dlc content.
Also excerpt from wiki about Vanilla software could be used as an example:
"In computer games the term "vanilla" is often used to describe the original version that has not been modified with third-party addons, nor developer updates or patches. It can also refer to the original game engine when source ports or expansion packs are available"
It looks like thats the general consensus, but it doesnt mean that everyone must agree of course
Actually, disabling an ENB is pretty easy, I just press 2 keys and that's it, if you would've requested me to make a screenshot of those sliders without the enb, I would've done it in no time. And no I don't want to commit seppuku when I see Skyrim without a graphical modification, because the other half of my Skyrim gaming time was without any mods, and I enjoyed it just as well.