i did ride one a few times.
took some lessons in the French alpes.
they were 125cc 4strokes but still heaps lots of fun!
that's why i want one too.
but where i live (belgium, along the coast) everything is as flat as can be :-p so no natural obstacles anywhere.
plus, people in my country are not motor-minded
still i do try to have some fun here and there,but try not to annoy people around me.