I'm 18 an currently taking full advantage of it. I ride my bikes every day (to school, to the beach, to peoples' houses, etc...) and always have something new to come up with, or build. I always hear my grandpa say "years go buy fast, enjoy being young"
I surf often and really enjoy talking to people 40 and up because I really enjoy listening to how different times were when they were kids, and most of them are pretty mature.
I try to hang around people a lot older than me, because people in my age are into some crazy stuff, and I'm not into electronics unless its point-to-point soldering tweed covered tube amps.
-Jon