In my case WotLK was the best. I was having a blast Priest-healing PuG's for instances. I never went to even a single raid though.
But as said the game itself became a job. What do you end up doing with your flagship character? you log in, chat a bit, see whats up. Dailies, maybe PuG an instance. Then that was it for me, without ever raiding I just couldn't care after I finished my daily routine.
Ahh well, glad I'm done with WoW. 5-years down the drain.
- That's a very nice everything you have there... ssssssssSSSSSSSSSSS -