Having no responsibilities.
Believing that all those baseball cards I was collecting would one day make me rich, instead of simply turning me into an obsessive-compulsive. (No lie, I can trace it back directly to card collecting, where I became obsessed with order, condition, and completion.)
Enjoying writing and believing I was good at it.
Creating massive cities for my Matchbox Cars in the sandbox, including garages which were located under the two benches on either end.
Transformers.
Riding my bike down to the corner store, stocking up on soda and candy, and going back to a friend's house to play video games and get sick.
When Saturday morning cartoons were actually good.