Too many to choose from, but no-one's mentioned the funny song that I identify most with - "Not Tonight, Marie!".I've often wondered about "So much for winning" - funny or mock serious, or serious, or what?
The Paxton song I sing most often - "Leaving London". I first heard him sing it at the Troubadour in the sixties, and it's been with me ever since.
My favourite Paxton song sung by someone else - Alex Campbell's version of "Hold on to me, babe"