The last good WoW expansion. I still absolutely adore the environments and world to the point that I sometimes boot up a completely empty private server that no-one uses just so I can have it all to myself for a few hours.
The base game was always giving you enough carrot-on-a-stick quests and items to keep you going for long periods of time. It's not "nice" game design that respects your time but who plays this for any reason other than to have a virtual project to sink your life into and forget about your real-life commitments that just don't reward you as frequently as this?
I enjoyed by time with this game a lot but in terms of getting back into that cooldown combat, killing 10 bears for a 33% chance of a quest item drop, joining dungeons and raids so people can moan at you for not playing in the one specific way they want you to (sorry to any guildmasters I made twitch with that one, lol), repeating all of that hundereds of times so you're able to progress to another area, I just have no interest in going back to it for that reason.
I got what I wanted out of this game when I needed it, and that time is long gone, but it's nice to know it happened.