I think I have an unusual entrance into gaming.
When I was eight, my mother took me to the public library to get books over the summer break from school (I didn't like television much, especially not the cartoons of the mid-eighties). On one such trip, I found a mysterious tome entitled Player's Handbook. Well cool, a big idol on the cover and neat drawings inside, I checked it out.
I ended up reading that Player's Handbook cover-to-cover something like four times over the course of a week.
The rest of that summer was spent scrounging together some polyhedral dice and begging my parents for the three core books. Alas, they were pretty much cheap-assed and they balked at the idea of spending fifty dollars on books (which they assumed I'd get bored with in about a week and never touch again). Fortunately for me, the books were always at the library and no one but me ever checked them out. I couldn't get anyone else my age to understand how cool this game would be if I ever got anyone to play it, so I spent alot of time rolling up characters and drawing dungeons on graph paper.
Finally, when I was eleven, I was able to convince some people to play with me. I don't think the other kids really got it since I told them it was a "game," but I didn't have any minis or anything like that. Fortunately, I was able to fall in with a gaming group of twenty-somethings that realized that I was a smarter-than-the-average-bear type and they let me play with them. Best campaign ever!