One of mine is that I never heard Swedish tenor Jussi Björling sing in person...this is from one of his last concerts, in 1960, when I was already 15 years old!
I could have hiked across the North American continent, stayed with Tink's family in Long Island (since Tink herself was not born until twenty years later or something like that), then I could hitchhike across the Atlantic to Gothenburg in Sweden and listen to this!
I never even heard of Jussi (who must have been sent by angels or something) until I began listening to Charley Pride after his death last December...they both sang "O Holy Night"...prepare yourself for something wonderful here...