Its an excellent question.
I grew up in the 70s. I was a geek for the most part. Started gaming at the old arcades with Pong. My first home-gaming experience was with Commodore Pet (4k of ram, yeah you read right). The games were just attrocious, but I was hooked. My first real gaming rig was the Apple IIe and it was an awesome experience. Still remember all those great games in green and black (choplifter, captain goodnight, the original ultimas). My first consoles were in my late teens (my parents wouldn't let me have an Atari/Intellevision/Coleco) a Turbographix 16 (regretted not getting the sega genesis) and an original gameboy which I bought with my own money. College came and I started my PC gaming life, and shortly thereafter PS1, N64, PS2, Xbox, Gamecube, 360, wii... and here we are...
Then there was W.o.W.... I was obsessed for a while, being a couple of years. When I came out of that cloud, I frankly didn't want to LOOK at a screen. Took sort of a break from gaming. These days though, I'm back to the good old days... I'm about to turn 36 and feel that it is just part of my life. Not a major one, but something I do here and there...
I'll always be a gamer, though I sometimes wonder if I will not be able to compete in CS anymore as the kids get crazier with their energy drinks and whatnot...