Not necessarily in any order:

Dressing Room
Combat Metrics
Mini Map
Constellations
Code’s Combat Alerts
Azurah (for moving stock UI around)
Lost Treasure
Skyshards
Lui Extended
Srendarr

I left out the crafting ones. Some of these are most useful for specific characters. Dressing Room is great for tanks to quickly change to dps gear. Srendarr is pretty much for dps chars. Combat metrics is primarily a dps tool as well.

My "must have" selection:

Action Duration Reminder
Advanced Filters - Updated
Azurah
Combat Metrics
Constellations
DarkUI (it's a purely visual and no added functions, but looks much better than the stock visual)
Easy Travel
Map Pins
Urich's Skill point Finder
Votan's Keybinder


Also depending on which extended UI you choosing, if that has no minimap then you need one:
Votan's Minimap

Action Duration Reminder
Bandits
RaidNotifier
ToxicPlayer
Inveotry Insight
Awesome guildstore

I use a version of Alphagear rather than Dressing Room. Thoughts comparing the two?

I still use Lorebooks, and also have another add-on (I forget which) also showing lorebook locations. I think two is a little better than one in this case. (Reason: Many lorebooks have up to four possible locations.)

I've recently noticed Harvest Maps working somewhat like Keen Eye passives, and only showing nodes that are currently present.

I just downloaded Custom Idle Animations, and it's fun.

TheShadowScout wrote: »

NONE!

Play the game as the Divines... errr, the developers intended! Yes, even on PC!

(Personally I just find it more fun when you play yourself instead of letting add-ons show you where to go, what to do, etc.)

I would agree if the UI was beautiful, and intuitif. BUT it's not.

i use addons that correct the UI and bring some visual quality to the UI, allowing me to see distinctly icons, skills to speak only of those

If you're interested in crafting:

Dolgubon's Lazy Set Crafter
Daily Provisioning
Dolgubon's Lazy Writ Crafter
MultiCraft (won't need it after next update)
Potion Maker for Alchemy Crafting
Research Assistant
WritWorthy

I, as an addon dev, say: I don't ask for add-ons and use them.

You don't know what is built-in and what is from an add-on. You don't know the pain why you need an add-on.
First play without add-ons. If you feel the pain, use the search button. (And remember the recommentations here)

AutoInvite
Clock
Combat Metrics
ESO Master Recipe List
HarvestMap
LoreBooks
Lost Treasure
Master Merchant
MultiCraft *
Potion Maker
SkyShards
Srendarr
Tamriel Trade Centre
TraitBuddy
Votan's Fish Fillet
Votan's Fisherman
+ sundry libraries