After a bit of googling, here's the transcript of an online chat with Sir George:
ladysue44: What was your favorite Beatle song and why?
george_martin_live: another difficult one!
george_martin_live: if its Paul - Here there everywhere - its such a lovely simple song
george_martin_live: if its John - Strawberry Fields - A real touch of magic
george_martin_live: If its George - Something - an unbelievable piece of music!