Mine is perhaps a bit longer and more convoluted story than most.
I first played D&D at age 8 or so (OD&D in the red box) although I was much more interested in my friend's mammoth collection of Star Wars toys (this was before Empire came out, but he had everything from A New Hope by Kenner) so I didn't pay too much attention at the time.
A few years later, I was in fifth grade and I had some friends who lent me the red box books, and that's when I really got into and understood the concept of roleplaying games. But I still wasn't hooked yet. I migrated out of D&D for a little while spending more time reading fantasy than playing it.
The Fighting Fantasy Gamebooks by Steve Jackson (no relation) and Ian Livingston kinda brought me back into the RPG orbit, though, and in junior high I played with some other friends. These guys were real losers by today's standards (at least the way they played D&D) and even at the time I didn't particularly like playing with them but I finally saw the potential of RPGs. However, I was an outside observer for a number of years, following but not really participating in the hobby.
Through the years I'd pick stuff up, mostly at Half-Price Books, and I actually developed quite a collection of games I've (mostly) never played. I finally found some friends in college that I really enjoyed playing with, although we never played D&D: we mostly played Top Secret SI actually. I also got big-time into Werewolf, although again, I was mostly buying and reading the books rather than playing them. During this phase, I actually had little interest in D&D itself, as the 2nd edition books I thumbed through at the store didn't really excite me much.
The release of 3e coincided fairly closely with a major move of almost 1400 miles. I was excited enough about the new game to get motivated to go find a group or two to play with. I'm still kinda off and on as far as being able to play, but I think I can safely say that I'm good and hooked as far as interest goes.