I canceled my WoW account today.
Well I have a recurring subscription so I have over a month left of play.
I don't plan on quitting immediately and if I end up having unexpected fun before my time is up I'll resubscribe.
My reason I gave Blizzard was "I play too much." And it is true.
Back when I was having a blast playing WoW I didn't care that I played a lot. I'm having a little fun now, but not enough to justify how much time I put into it.
4 days ago