I only use Destinations and MiniMap by Fyrakin. Both are great and updated regularly. I don't PvP much but I hear there are a host of great add ons for showing buffs, debuffs, cooldown timers, etc.
It really depends on what you want addons for. I've never used some of the ones other people consider essential and find it extremely frustrating to play without some which other people have never even heard of.
My approach is basically to wait until I find myself really wanting something that's not in the game by default, and then I go looking for an addon which can provide it.
PC EU player | She/her/hers | PAWS (Positively Against Wrip-off Stuff) - Say No to Crown Crates!
"Remember in this game we call life that no one said it's fair"