Well...I'm turning 40 this year, which is sort of that even-tide between being old to some and young to others. I find it equally disturbing and refreshing when I'm addressed as 'sir' on the local campus. Comes with the grey hair, I guess.
I graduated college at age 23. (It's good to get in the habit of finishing the things you begin--pays dividends later in life.) Much to my folk's and girlfriend's (now ex-wife, hmmm) dismay, I decided to hitch-hike around central Canada and USA. Basically, I'd hitch a ride from national park to national park, at which point I'd hike solo across the park, pop out on the other side, and snag my next ride. Six months and 8,000 miles later, I knew a lot more about myself, the world, and its people.
My hairyest wilderness situation occured in Rocky Mountain National Park, where I took an easily avoidable fall into a stream full of 32 degree F water. The trauma to my pelvis caused me to lose the use of my legs for several hours. As luck would have it, this occured during an ice storm just below treeline. Hypothermia almost won that day. Although I eventually made it out in one piece, the experience permanently changed my approach to wilderness travel. I still travel primarily solo, but I'm (hopefully) a lot less caviliar (read: stupid) about things.
Aside with being threatened with mutiny charges on a Canadian ferry one blurry night, I managed to stay out of trouble. I've since quit drinking over a decade ago, and besides, technically, it was an Austrailian fellow who shares my name who incited the mutiny...something about the bar's closing time.
Mostly, I learned a lot about myself, what makes me tick, and what I value. I also learned a great deal about diplomacy and how to sniff out predators. One peculiar side effect after sleeping outside for six months: I was boiling hot whenever inside (68-72 degrees F) for a few months, but eventually that faded.
Oh yeah, I carried a SAK-Camper my grandma gave me for my tenth birthday throughout that trip. I came across it in a drawer the other day and smiled.
I'd do it all over again in a second. I still don't know what I want to be when I grow up. I bought an 1100cc dual sport motorcyle last weekend, so it looks like I haven't completely worked through my wanderlust phase.