I played sports all through my growing up years, mostly baseball and football...loved football but was a better baseball player. Funny though, because now as a grown man I prefer watching baseball. Anyway, some of the comments in this thread got me to thinking about sports and growing up and I wouldn't say I really learned anything worth any real value from that. I remember coaches telling us how this was shaping us into men, giving us discipline and all of that but in retrospect it's almost a joke. Come on, you're not teaching a high school aged kid any of that, you're just teaching him how to play a game and filling his head with delusion...in most cases.
I'd say very easily bodybuilding has taught me more and given me more of those things than any organized sport ever did, in-fact it's not even close. That said, it's also caused a lot of heartache and has not been without cost, that I can't deny. Was it worth it? Most of it, yes and there's isn't much I would change, although I definitely made mistakes and as corny as it sounds those mistakes shape you if you can learn form them.
I heard Arnold say this once, someone asked him if his son wanted to be a bodybuilder would he help him. He said he'd encourage him and do all he could. The guy then asked him if he'd help him with steroids and it got really quite and Arnold just looked at the guy. There was about 15 or 20 people in the room. After dead silence that lasted forever he looked at the guy and said "I said I'd do everything I could to help him." Anyway, just an amusing story.