So yeah... I resubscribed after 3 months leave from WoW and yeah... 2 weeks later that is today I canceled again.
Why I resubscribed? Well, my main goal was to do all dailies and farm achievements for fun since I was bored with raiding / arenas.
Why I canceled? Dailies became boring as hell. I tried to spice up with some pvp action in Tol Barard while doing dailies but this became boring as well. I got few achievement points going from ICC10-25 and ULDUAR10-25 like maybe 10 different achievements but my mind was like what the point of doing it now when I can solo everything next expansion and who cares about achievements... Anyways, I decided to do some world achievements, fly around zones but I couldn't enjoy Nagrand and all other beautiful zones as I did before, they were just boring now. So, yeah, probably going to be back to WoW again, hopefully not.
On a positive note, first few days were fun, doing dailies and first ICC run in like half a year. Game felt in slowmo after playing SC2 for a while with no WoW.
Peace.