I have had the exact same feeling while I was super happy with my life and had proper goals...
Now thats winter again and I stopped the gym well I feel the need to play... It seems to me that WoW is only playable during my unhappy-depressed times.
And it has to be like that I trully believe that people that play wow in general are depressed and have no need to participate in real life.
I am talking for the guys that pick the game on their own and play on their own.
When I started the game and all of my friends were playing it I was definitely not depressed or anything it was just that everyone in my circle even the girls were playing it so ye that was a reason behind it. But noawadays depression is the only reason as my circle doesnt play this game at all.