No idea if anyone would still be interested, but I just saw this thread and thought of a couple links some of you might like to see.
5 Creepy Ways Video Games Are Trying to Get You Addicted
http://www.cracked.com/article_18461_5-creepy-ways-video-games-are-trying-to-get-you-addicted.html
A story about what an EverQuest addiction cost this guy
http://kotaku.com/5384643/i-kept-playing--the-costs-of-my-gaming-addiction
As far as my own personal experience, there has definitely been times when I have been addicted to games, I think mostly either as a form of escapism, or as a form of competition. Really any single player game with a story for the former, and some time spent playing competitive multiplayer games online for the latter. Though I've always deliberately stayed away from MMOs because, well, they frighten the crap out of me. I don't drink anymore because I couldn't control that, and part of me wonders if I possess some elements that make me vulnerable to some forms of addiction, and it just isn't worth the risk to take even one step into WoW or any number of similar games. At least a game you play for the story will inevitably have an ending.