I will admit to a secret penchant for Stand By Your Man (Tamy Whynette). Its such a lovely song - when I'm good enough I'll sing it.
Long songs don't always go down well at singarounds (people being anxious for their turn to come around). I long to do 'Blow the Winds High-O' and 'King Henry'. I have no idea of the real tune to King Henry, so I made one up & I really like it - but it bored Mark nearly to tears, so I haven't yet dared......
I've also written a child-abuse song, which came out of discovering that a product I was asked to work on would be in effect providing a tool for anyone who wished to locate and lure children (mobile phone text based flirting application). The song is about where you draw the line of responsibility. I refused to work on the product, as did my colleagues & the business eventually went elsewhere. Which still doesn't stop it though.... Anyway, the point I was going to make was that the song was great thought-therapy for me, but I doubt if I would ever impose it on anyone else as a performance. It would feel like aggressively trying to force a reaction & might even cheapen the song.
Perhaps there are some songs that should remain private.

Kris