Ash, I know my limitations, so I stay away from dirt bikes. I have ridden motocross bikes on scramble circuits and I don't like jumping down-hill past gum trees which have 3 foot diameter trunks. I once rode an MX bike in a trial and put it through the spectators while it was up on end. I have also ridden a sidecar on speedway. So I stay with road racing where I am safe. Even with road racing, I tend to ride mainly at Winton, because I can almost ride that circuit blindfold. It takes a different mentality to ride on public roads, or through the bush. I did it when I was young, then I got smarter.
When I ride at Winton, it takes me 5 laps to get up to speed, then I am as quick as any, and quicker on the slow parts. The worst accidents are always the nasty slow ones. At high speed, you are usually safe. If I ever ride on public roads, I always ride faster than the traffic, that way YOU are in control. I never worry about crashing because I don't do it - 'been there, done that'.