Most films, when you've seen them, you don't really want to see them again. But just a few make you watch them over and over...Mine are, in no order of preference;
Water Lilies
Let the Right One In
Fucking Amal
Wages of Fear [made the year of my birth; really dangerous stunts, nail-bitingly tense]
Jean de Florette/Manon des Sources
It's A Wonderful Life
Metropolis
Leon [another great performance by a kid, Natalie Portman in this case...and you know what, crude action thriller or not, it did, like most of the others, allow her character the dignity of her feelings}
There are probably more if I could remember, but anyway...what are yours? What are your desert island DVD's?