The three most useful courses I took in high school (other than Driver’s Ed) were Typing, Journalism, and Latin.
The three most enjoyable courses I took in high school were Latin, World History, and Chemistry.
Three courses I always wanted to take, but never did (at any level): Old English, Geography, Economics. I am self-taught in all these subjects. (Actually, I avoided taking a course in Economics like the plague; all the Economics I knew until I started reading Thomas Sowell a few years ago I learned from Scrooge McDuck.)
Best education advice I ever received: my mother told me, “Never let college interfere with your education.”
My opinion of public school when I was a high school senior was that it suffered from a serious lack of competition; nobody had any incentive to do it any better than it was being done. I have not changed this opinion; if anything, I have become more emphatic about it.
What I wanted to be when I was in Sixth Grade: a cartoonist. What I started out in college to be: a lawyer. What I wound up being: an ordained minister.
Three things I always wanted to do, but nobody ever asked me to: to sing the National Anthem at a sporting event, to give a commencement address, and to teach a course in Bible as Literature.