What mods am I using? Holy shit, that's gonna be a long list. But let's go. Note: I don't use all of these at once. I can, but there are some I'm probably going to get rid of.
Unofficial Skyrim Special Edition Patch(a must have)
Live Another Life - Alternate Start(really useful if you hate the long vanilla start)
Cutting Room Floor
Rich Merchants of Skyrim
Wildcat - Combat of Skyrim Overhaul(highly recommend)
Apocalypse - Magic of Skyrim Overhaul(highly recommend)
Ordinator - Perks of Skyrim Overhaul(highly recommend)
Compatability Patch for Ordinator/Apocalypse
Rebalanced Loot Level Lists
Relationship Dialouge Overhaul for Followers
Essential Followers(recommend so you don't accidently kill your follower)
Black Mage Armor SE
Unlimited Rings and Amulets
YOU DON'T KNOW ME - No NPC Greetings(which I love)
Triss and Yennefer Armor
Geralt Armor
Campfire
Frostfall
Wet and Cold
Vivid Weather
Ars Metallica(highly recommend)
Reflection - Level Up Messages
Marco's Integrated Level Lists
Convenient Crossbows
Merchant Death Prevention
Longer Magelight and Candlelight
Lanterns of Skyrim
Conan - Age of Hyborian(really really good)
Realistic Conversations
KS Hairdos Lite
Cheat Room
Sheogorath's Cheat Spell
Sofia - Fan-Voiced Follower
Corvo Armor and Weapon from Dishonored
Increased Follower Limit
College of Winterhold Overhaul
Valiant Nord Bow
Immersion Indigestion(everyone farts in combat and it's funny as hell)
Okay, I think that's all of them. Or well, the one's worth mentioning. Most of my mods tends to be more focused on immersion stuff. I was doing Wildcat + More Populated Forts/Dungeons, but man, I kept getting my ass kicked(read: swarmed) because Wildcat is not kind with the way it sets up it's AI(it's a lot smarter in fighting).
EDIT 1: A lot of my other mods revolve around making followers better and merchant stuff. There's nothing truly game bereaking beyond the Cheat Room, which I mostly use as a portable smithy/enchanting spot. I mean, yes, I COULD improve everything to 100, give myself so many perks/dragon shouts/whatever item I wanted, but I feel like that makes the game boring. SO I kinda would rather earn it.
Right now I'm playing a Nord who just became Arch-Mage, because I liked the irony in a Nord of all races becoming Arch-Mage. Though for some reason, all these experienced teachers decided that 'yeah, let's make the guy with 35 Destruction magic who knows like, four spells to be Arch-Mage. Not like we have high standards or anything'.
EDIT 2: So, I can't stress this enough. Ordinator: Perks of Skyrim feels like you're playing a completely different game. I love it, it allows you do so much more than the vanilla game ever could. I feel like this is how the skill trees should have been. You get so many options to mold and modify your playstyle to whatever what you want. Wildcat, Apocalypse, and Ordinator are must-haves now for any modded playthrough for me.