My list is generally in flux as i try to find a stable and balanced game i like

Currently using:
83Willows 101BugsHD
A Quality World Map
A Thinner Compass
AOF Believable Hair
Armored Skyrim
Arrow and Bold Tweaks
Ars Metallica
Auto-cast Racial Powers
Better Beast Races
Better Dynamic Snow
Better Fast Travel
Better Magic
Better Sorting
Better Quest Objectives
Blessings Alter Descriptions
CBBE
Claralux
Cloaks of Skyrim
Colored Map Markers
Cover Khajiits
Dark Brotherhood forever moved to misc
Dawnguard
Deadly Dragons
Deadly Spell Impacts
Design of the Nords
Detailed Faces
Diverse Priests
Divine Shrines
Dwemer Spectres
Dynavision
Enhanced Distant Terrain
Enhanced Night Skyrim
Follower Trap Safety
Glowing Ore Veins
Green Water Fix
Immersive Armors + For NPCs
Improved Container Names
Improved Night Eye No Blur
Interesting NPCs
Item rewards for Bounties
KenMOD Time on Loading Screen
LFox Alchemists have Ingredients
Lockpick graduation
Long Lost Smelters
Lore Friendly Artifact Rebalance
Lost Art of the Blacksmith
Main Menu Spinning Emblem
Makers Mark Ingots
Misc Items Reweighted
More Morrowind like Glass Armor + Weapons
Move it Dammit
Natural Favorites Expanded Menu
No Dirty Bodies
No more Blocky Faces
No NPC Greetings (reduced)
Not Really HD Claws
Omegared99 Armor Compilation
Open Faced Guard Helmets
Project Reality
Psychosteve's Dragon Priest Masks
Quick Start - Skip tutorial
Radiance
Readable Road Sign - Weathered
Real Ice
Realistic Ragdolls & Force
Rivers for WATER
sixy Villages & Towns
sixy Winterhold College
Sill level of Detail - Potions& Poisons + Wine Cellar
Skyrim Flora Overhaul
Skyrim Monster mod + Lore friendly Replacer
Skyrim Performance Plus
SkyTEST Realistic Animals & Predators
SkyUI
Solitude Docks District
Subliminal Traps
Super Realistic Ore Textures
Tamriel Compendium
Terrain Bump - Texture Pack
The Dance of Death
The Eyes of Beauty
the Paathurnax Dilemma
Thieves Guild Requirements
Travelers of Skyrim
Trees Big Version
USKP
UDGP
WATER
Well Placed Weapons & Quivers
Whiterun Trees
XCE - Dawnguard
might have missed a few

... most available on Nexus