I have a few friends that have them and i keep seeing them more and more all the time...i know i would love riding one because i love excitement and thrills..i would need to learn how to ride though, never rode a bike before..im also 6'4 pretty tall soo i think i'd probably be uncomfortable on one of them, but people so unless ur really short ur gonna be cramped on really long rides anyway..so what kind of bike should i start with??? im 20 years old btw.