Honestly, a big part of being in SXM is because you are on vacation. If you live there, regardless of the surroundings, it's not the same. That said, it depends on what you associate with SXM. For me, I have no desire to do snow, ice, etc., any more and Florida suits me. There are some practicalities, like health insurance, as the prime example, that there is no substitute for living in the US...