Middlemarch. Never got round to reading it, but on my island I wouldn't be distracted by more alluring books. Read War and Peace in hospital, on the same principle.
One Fine Day, from Madame Butterfly, sung by Ying Huang. There are so many songs that mean a lot to me, by people like Leonard Cohen, Bob Dylan, Paul Simon, etc, but I couldn't choose just one to play over and over again. One Fine Day, on the other hand, is a thing of sheer beauty.
I would want a photo of my entire family together but don't have one, as half of them are in the USA. So I would take my favourite photo from our wedding.