I have an active subscription in the official server as from time to time I enter, level up, do some PVP, rage about the shitty game and unsub... and go back to the process.
The words on the street nowadays are "Nostarius" and I said, ok, fuck this, lets try Vanilla servers. So logged into one that looked pretty good and... HOLY SHIT !! THAT IS WoW !! That feeling of levelling up as a challenge in the HUGE world... amazing feeling just from getting to 1 to 10 (and now... talents ! Woohoo !). Leveling up in actual WoW is one of the less rewarding and shittiest things I have ever done. Running OOM against a fucking wolf in lvl 6 is something I didn't see in a looooong time (and got spirit stat back ! Yes ! XD)
BC was great, WoTLK was good (but the LFG ruined the game), Catas first months before the massive nefs were amazing. Pandaria is just beautiful and WoD is a big piece of crap. Lets see Legion. I'll probably buy it, hate it, and go back to my Vanilla servers.
Blizzard, admit it, your game just sucks now, so put Vanilla, BC and Wrath servers so I can pay you my 13 bucks per month to play an official vanilla or BC. End your game with Legion and do what your real fans are asking to you. I'm sure that 1 million subs would gladly pay again to revive the awesome game they played long time ago. And it would feel like a reset, everybody starting from scratch, although we know the mechanics, the stats and the classes ! Holy shit, that's my dream !