i don't think i would have changed anything. not that it was a perfect point in my life, but high school was just a business like environment. everything was about working and going on to college. they made high school nothing more than a stepping stone for your career. i played football, track, was my class president, etc. we partied and had fun, but you were there to work, get out, and go to college.
the one major draw back, (as others have mentioned) was that it was a all boy school. with not having girls around, and not having any sisters, i was pretty clueless about women when i went to college. that blew some opportunities for me that i wish i had back.