Haven't any of you guys ever tried stand-up Jetskis ? (Sit down Jetskis suck ). It is one of the most fun things to do ( with your clothes on ), other than bikes & is sort of like a mix of MX, waterski-ing & surfing . Jetski-ing in surf is like riding motocross , where they move the jumps every lap . Some advantages over bikes are : no dust ( so you don't have to clean air filters ) & you don't have to change tyres , chains , sprockets or gearbox oil . You also don't have to worry about setting up your suspension & you usually don't get gravel rash when you come off.
Some disadvantages are : you can get very itchy repairing fibreglass & you usually can't push your Jetski back to your car / toolbox , when it breaks down .
I have always owned a MX bike, from when I was about 15, though & I have been accumulating them ever since . I have also played a bit of hockey , windsurfed , waterskied & done a bit of snow ski-ing as well .