I was thinking about this subject this morning. The show Phineas and Ferb shows that the two brothers end up a bit dull by the time they finish high school. They aren't flying F-15s through the city or living off their several money making adventures. They're worried about College and romance, and being normal.

As a Cub Scout leader I've seen it several times. The guys come in with ambitions to do a bunch of fun stuff, and then they hit middle school and are terrified to do anything.

I only know of one my scouts who went after his dreams. The rest faded a bit.