Truck driver. I was fascinated by big rigs and learned as much about them as I could. I think this was aided and abetted in the 70's by the CB radio movement and the trend toward "big rig" TV shows (anyone remember "Movin' On"?) and movies like "White Line Fever".
I eventually realized that I wasn't down for the life of the over-the-road owner/operator, but I still loves me them trucks.
Not really "grown up" yet, as I spend lots of days hanging around with kids, talking about books. And when I'm not doing that, I'm riding my bike.