I wanted to be a Game Warden. I wanted that all the way to the end of HS but I wasn't tall enough. In those days you couldn't be anything under 5'9" and I'm 5'8".
Every aptitude test I ever took as a kid put Game Warden at the top of the list.
For awhile I wanted to be a fighter pilot but the total farce of the Vietnam war took away any interest in anything military.