Leave it to Jim to strip a question down to the essential. Hmm I guess for me it would depend on who's asking
and where I am. If I have to narrow it down to just one it'd prolly be a medley of "Little Bitty Pretty Thing/Rockin' Robin",
In church it might be "Amazin' Grace" or "Now Is A Needed Time"
I sing, so I have a choice of an instrumental, or accompanying myself with voice.
"You May Educate A Fool, But You Can Never Teach Him To Reason"
Reed Smith wrote: a medley of "Little Bitty Pretty Thing/Rockin' Robin",
I really like the Rod Piazza version. I sure wish I could play it.
Rod's version with Mike "Junior" Watson on guitar is where I learned it, I don't why it just
seems to come out, like your "Tennessee Wagoner". However, if I were asked the same question
25-30 years ago, it would have been something else, "What's The Matter With The Mill" prolly.