I dune cause it's where I get to unwind and just have fun. There no worries out there. I like the feelin of being all alone with your thoughts in your helmet. Even though your concentrating on riding your mind still wonders a little bit. I also like the challenge like 764 said, it's fun to push yourself and your bike to see just how hard you can go at it. And I also really like hanging out at night BS'n and having some beers with your friends after a nice day of riding.