Strive for balance in life. Too much of anything can be bad for you. By playing computer games all the time it takes you away from other expereinces in life. The same could be said of anything that consumes all your time.

You need not stop it. You just need to make sure you are taking out enough time for other activities as well. I know it gets really addictive but computer games ain't everything. There are bigger priorities as well. T one point, I was literally hooked to gaming 24/7 esp. when the Left 4 Dead (http://www.webtvhub.com/left-4-dead-2-e3-2009-teaser-trailer-bigger-better-more-gruesome-zombie-action/) was released, but I have managed to cut it down. I play like about 2 hours a day and I think that's good enough to relax and then focus on other things.