Now that I think about it, I don’t think it was one thing.
When all was said and done, I had the opportunity to try many different things when I was growing up. My parents supported many different endeavors for me and my brothers. So perhaps my obsession was just doing all sorts of things.
Like painting and building model airplanes. Hanging them from the ceiling in my bedroom. Squadrons of B-17’s, B-24’s, Mustangs, Corsairs, Spitfires, Hurricanes. Tanks and armored carriers on the shelves.

Estes rockets too!

Walking home for lunch from grade school at The Lane for a sandwich, chips and a glass of milk and watching Bozo the Clown on WGN.
Riding bikes all over. Even taking a bag of clubs to the local par three and spending five bucks to play golf for the day.
Fishing trips to Iron Mountain, Michigan, Bangs Lake, Spring Lake or on Lake Michigan for the Mighty Ohoc with Dr. Cerchio.

Listening to records at “11” in the living room, laying on the floor next to the console, reading the liner notes.
Block parties.
Playing army.
Whiffel ball, stealing bases, or football in any one of the front yards on the block.
Street hockey.
Learning to cut the grass.

Shoveling the driveway, then making snow forts and igloos.
I grew up with an opportunity to try and do all sorts of things back in the day.
Leading to my decades old obsession now.

That is just one of them.