Over my 6-7 years of WoW, i've quitted many times in vein. Momentarily i'm clean for about 5 months.
However, i do still enjoy gaming (i play on the PS3 atm) and I basicly do it whenever I can. Now.. gaming is a thing alot of people like, but WoW was on a totally different scale. I even played it when i did not feel like it.
Recently i started thinking: Why don't i have the desire anymore to come back to the game? And I concluded that one of the most important reasons to come back was "I allready invested so many time and money in this game, that quitting would make that all in vein". Ironically, it was allready all in vein because well.. its a game. I layed out several scenario's that all had they're effect on why i kept playing WoW, i was wondering if you had the same reasons.