Real gamers love their games and their medium, and know how not to let it ruin their life, but enhance it. Gaming is a wonderful thing, until the addicted allow it to control their life, and ruin it because they can't get their lazy ass off the game to take care of their life responsibilities. That's just how I see it though. All kinds of gamers are all kinds of awesome. Except the female gamers that suffer from Gamer Girl Syndrome. >> "I just beat you, and I'm a GIRL!" Those gamers need to get over themselves.
In a nutshell: Real gamers retain their self-control and show restraint when needed, and do not let gaming habits run their life. You do what you need to do, before you do what you want to do.