Old player coming back after a long break
We can’t tell you what you will most enjoy. I mean, I can say “necromancer” because that is what I most enjoy, but … I found warrior decent but ultimately unsatisfying, so clearly we don’t entirely agree.
I’d strongly suggest trying whatever you enjoy. Engineer is fun, though you spend most of your time on kits. I found that the “throw faster, explode larger” trait for grenades, plus that kit, were awesome, and the flamethrower was fun for condition oriented damage.
Ordnaxx.8614, play berserk (elit spec of war) he is good in end game content.
But I have to say play any class u like!
If you want something that won’t be a completely new experience, I’d suggest guardian. Solid class imo. If you want something that plays very different, engineer or elementalist would be my suggestions.