"If you would tell me the heart of a man, tell me not what he reads, but what he rereads." François Mauriac
Amen, my sisters and brothers!
Oddly enough I've been thinking of pruning down our collection of books to those that I, or my better half, are likely to re-read. And maybe our collection of DVDs (and P2P stuff) to those movies and TV series we'd re-watch (like The Unit, which is definitely on that list).
BTW, I know what (fiction) I re-read: Vance, Heinlein, Perry, Hiaasen, FABLES.
Can't think of anything more for a desert island. Plus I read my own stuff, of course, but this is usually done for proofing, though every now and then I like to revisit my characters just for the heck of it. The guilty privileges of an author: looking into his own soul, if you will.
Oddly enough there isn't much non-fiction in the re-read list, and the few included are Vance and Heinlein bios, and of course Alan Harrington's 'The Immortalist'.
So, that's some 'heart of a man' for you!