nothing wrong with your approach Jim, but there are many ways of presenting a perfomance, i have just been listening to an online Martin Carthy concert, no humour , but still excellent, excellent guitar playing excellent presentation, excellent communication and intersting story songs.
singing for fun is very much why i do it Jim, i chose this genre rather than pop music, not for one minute thinking i would do it to make money but because it was FUN. AND I ENJOYED THE MUSIC
FUN is also about striving to perform as well as you can that is part of communication
FUN is not about turning up with a guitar that is out of tune and NOT bothering to tune it, OR RUMMAGING THROUGH A FOLDER OF BITS OF PAPER,singing out of tune playing an out of tune guitar.
you are a good perfomer Jim, but would you enjoy playing your box if it was out of tune or if there were a couple of notes that did not sound when you pressed them or if you [for health reasons] could no longer sing in tune.
bad perfomances are not fun for anyone unless you are masochists