My very first forays into programming were self-styled interactive fiction games at the age of 12. In fact, the first software I ever sold was a disk of two interactive fiction games based on a couple of classic Doctor Who episodes. I was 15 at the time, and I think I made a whopping $20 bucks. (Errr ... That's $57,000 in today's dollars.)
I spent most summer breaks in high school playing Infocom games, and don't want to know how many hours I spent in college listening to prog rock while playing MUDs, MUSHes, MOOPs, and the like. When Infocom's ZIL specification and Z-Machine emmulators hit the Internet, it was pretty much game over for me (an avid LPC hacker). There's even a Z-Code interpreter for Android phones. If you had told that to the teenage version of me, who waited patiently for the five minutes it took his Commodore64 to load the latest Scott Adams creation back in '84, his brain would probalby have exploded.