I guess I would rather not be injured, and not be able to ride my road bike, so I hardly ever mountain bike. I love being out on the trails/in the woods, but I am so nervous and terrible at mountain biking, that it's probably not the best sport for me. Anything where getting hurt is routinely part of the plan, I don't know. For awhile, I was getting pretty good at it, but since it's something where practice is key, I never progressed. I feel guilty taking time away from my road bike, though not so much now as in years past.