I can't seem to stay focused on this game anymore. Just general fatigue of playing the same game over and over again for so many years. It's not that it's bad, though it did get bad at some points (early Cataclysm was the worst to me).
I did start playing again recently to check out the timeless isle. That was pretty fun. Then I went back to working on the legendary cloak questline, and got bored again. I really have to PvP to get a PvE cloak?
WotLK was the last time I was REALLY into it. I think I played more or less continually for about 2 years. Since then I'll resub to check out the new content and get bored after a couple of months.
One of the big selling points of the new expansion, the garrison, doesn't really do anything for me. Not sure if I'll be back. There's still not a lot of info about the expansion specifics.