I find that whole thing interesting, because I was a casual gamer my whole life until my dad died. After that I got into it a lot more, and somehow during the proccess I fell in love with video games.
I suppose it makes a lot of sense for me, in context. I've been a gamer as long as I can remember, but it had never been a big part of my life. My dad taught me how to play Sonic the Hedgehog on the Genisis when I was a kid, and we played racing games and snowboard games when I was a tad older. I already ownend a Genisis, PS2, DS, and Wii at the time. Not that I played the Genisis anymore, but...
Anyway, I think it was the Christmas after that I was in the mall with my mum and I bought Metroid Prime 3: Corruption. I got Twilight Princess for Christmas as well. A few months later I bought an Xbox 360. I'm proud to say I never looked back.
I think gaming really is as Logan Westbrook said; a deviation from the situation. A way to keep your mind occupied. For me it became something to care about. And without a doubt it's better for you than movies or TV, as great as they may be. Gaming you actually have to focus on, and you feel a lot more of it. When you watch a movie, the simplest thing can remind you what you're trying to forget. You can let your mind wander and become more depressed. With gaming you feel what the developers want you to feel - if they're good at it. It's the benefit of interactive media. You feel frustration fighting through a level, you feel joy finishing it. You feel satisfaction, you feel disapointment. It's a great thing.