I can't really answer that, maybe 4 or 5 times?
I always take a break when the content isn't satisfying enough, in fact, I just quit WoW about 2 months ago, just for the exact reason. Also, it really refreshes you up when you don't have to worry about raiding and stuff like that. (I'm pretty HC player on this matter when I get into it >.>)
Possibly starting to play after next expansion is launched, just to see the new content.
I always take a break when the content isn't satisfying enough, in fact, I just quit WoW about 2 months ago, just for the exact reason. Also, it really refreshes you up when you don't have to worry about raiding and stuff like that. (I'm pretty HC player on this matter when I get into it >.>)
Possibly starting to play after next expansion is launched, just to see the new content.