The islands of Thailand are the stuff of castaway fantasies. White sand, rustic-chic beach shacks, a hammock gently swaying between two palm trees as a turquoise sea laps at the shore… But each is quite distinct from the next, with its own characteristics; and there are dozens to choose from - so which is the right one for you? Here, Nell McShane Wulfhart selects one for every occasion, whether you want to party til dawn, learn to dive, eat the best Thai food or escape from the world on a secluded, romantic break.