I don't know much about others games, but i can say about WoW... i used to be a hardcore Raider and semi hardcore PvP player and i enjoyed much more the game from 2006 till 2010.
Then i don't know what happened i started to become semi-hardcore then soft-core then casual and now days i just log to say hello in game and on Ventrilo to the people i raided for years

Prob the game brig to many easy epics and to much content to see to casual players and i dislike it, or prob most of people like me got bored after playing this game for so many years ... I remeber in TBC days all guild used to yell/scream on Ventrilo when we downed Vash , Kael, Archimoide, Illidan and Muru pre nerf, now days same guild says " oh just another kill gg guys

"
So yeh also getting bored =))
Diablo 3 was nice but just for 6 months, and now farming same 4 levels continuously on more difficulty levels made me "bored" too!

Also saw my bro who was home from Italy for 1 month playing Guild Wars 2 and watching him few hours i had the feeling is just a bad copy of WoW

(just an opinion seeing the game few min per day

)
But like some mention i hope Elders Scrolls Online will make us enjoy MMO games more than now, and personally i also wait for the Starcraft 2 expansion "Heart of the Swarm" since i enjoy S2 storyline
