Compared to many people I can say with almost 100% piece in mind that I wont come back..
I played DaoC and AC2 before WoW

(DaoC -> AC2 -> WoW and now -> WAR)

Have never taken a break in any of the games, I just change game..
But as I said, if I come back - It will be solo.. But yea, if only I got a penny for it aswell