WEll, as an audience member rather than a performer, I will be a lot more sensitive to the feelings of the performers. I'm afraid I have seldom given much thought to how many times they have done the song when I go to a concert wanting to hear it.
I've gone to one Peter, Paul and Mary concert, and they did sing Puff. One Pete Seeger concert and he did Abiyoyo. And so on. I am more grateful than ever after reading your posts, but it won't stop my wanting to hear them. Some are so familiar from having played them over and over but I've never heard them live and that is what I really want when I go to the concerts.
And how awful that I LIKE the maudlin ones. Fields of Athenry; Kilkelly, Ireland; The Band Played Waltzing Matilda; It doesn't say much for my depth of character, I guess, but I do go to a concert hoping to hear them, and most times there is someone there who has never heard the songs before. Just as I have never heard so many mentioned here.
Just think how fortunate you are that you can sing something people want to hear so much. Not just the song, but you the performer must be pretty good.