I've taken several extended breaks. I was WoW-less most of this past year. Back in Vanilla, when I was still just playing one toon, I quit after the AQ opening. I was so burnt then that I vowed never to come back. BC had been out a few months before I begrudgingly came back. I've taken some shorter breaks here and there. Eventually something piques my interest and I come back.

The moral of the story - When they say 'I can haz ur stuffs?!' say no. You might need it some day down the road.