Started riding 3 wheelers and 4 wheelers when I was about 9. Wasn't allowed to have a bike, so I rode a friend's XR80 quite a bit. The neighborhood I grew up in was in a suburb with a lot of acre empty lots, trails, creeks, etc, and it seemed like every kid had some sort of off road vehicle. Continued to ride until I was about 15, about killed myself on a quad and pretty much quit.
Throughout the years I'd ride anyone's bike that would let me. . Every year I'd want to get a bike, and every year I'd come up with another excuse. Usually that excuse was the, "It's not you, it's the other people on the road" deal we've all said or heard. Finally I said screw it, took MSF, got my CBR600 F4i, and haven't looked back.