The term "casual gamer" is being thrown around more and more these days, mostly due to the popularity of the Wii, and I think, the growing popularity of gaming in general. The Wii is really the first democratic console — we've seen senior citizens get in on the action, physical therapy patients use it, and now, Wii Fit is set to become the first video game since Dance Dance Revolution to make you lose weight, instead of pile it on.
A casual gamer is different from a hardcore gamer in obvious ways — both in time devoted and the interest level.
Interest in video games is generally a hobby for casual gamers, whereas the interest is almost professional for hardcore. So my readers, I'm curious! Do you define yourself as a casual gamer or a hardcore gamer?