I'll stop playing when it ends.
Yep, been playing since the beginning and regardless of the design choices over the years I've felt that the game, story and overall system works well for me, keeping me a happy customer more or less. ( not to say I love all the choices Blizzard made, they've made some stinkers that's for sure, but each big change felt like it was for the best interests of the game's future, rather than simply ignoring the players as many other MMO's do.)
Mostly playing for the story and my guildies though, as well as being an avid RPer! Rping makes the game go as far as your imagination! :3