I have been on the dragon with a number of different bikes, but the most fun was in the wife's MX5 convertible. Best describes as a 180 HP go kart with a 6 speed auto paddle shift transmission. My biggest regret was taking the wife as all I heard for 11 miles and 318 curves was "slow down, you are going to kill us"!
All kidding aside, it was more fun than on a bike.