I'd like a graphics overhaul recommendation, because I haven't been able to put my old one (of course this time with the highest options) together on my new rig. I don't mean a single mod, I mean vital retextures, a nice ENB, face, body, and hair (and beard) replacements, animation improvements (I don't like slootification, genuinely good animations are great), sound enhancements (though I believe I'm 100% covered on this front unless there's something I'm unaware of), as well as new content like DLC-sized additions (can't think of a single one, not even Gray Cowl), landscape and city/town/village enhancements (I've seen some good ones but have no clue about compatibility), and so on.
Basically, I want to make Skyrim a bigger, better game, in all available options, without making it not Skyrim at heart. I don't want anime girls with Death Note powers and huge Bleach-esque swords, nor do I want armor and weapons that don't feel appropriate to Skyrim.
TL;DR: I would be playing Skyrim a lot again if there was a clear list of mods with a well put together install list (or just good compatibility that lets me use LOOT or something like that). But, as far as I know, there is not.