World of Warcraft is one of the most addictive MMORPGs out there. I mean that literally–people get addicted to this game and (almost) can’t stop playing. Take a look at this post from one of the top players in World of Warcraft. The guy quit playing after spending ten hours a day, seven days a week on the game, becoming a leader in one of the top guilds.
This is why I didn’t stick with EVE Online. MMORPGs are fun, but they suck your the time away from real life experience. Go outside, people!