OP- while my experience is rather limited, and we are not AI ppl, and I'm not sure what budget might be, I can tell you that your idea of just doing nothing for a few days on the beach is just what we usually have on our itinerary- and while Jamaica is a beautiful and special place with interesting culture and people- I don't think its the best place to just sit and watch the sand grow. Not putting it down at all, just think there are better places for those of us who just want to sit. It looks like your on the east coast- and in that you are very lucky travel wise- I'd really really suggest another locale- either a beach spot like Tulum Mexico (just far enough from Cancun to be close travel without the crazy crowds.) I second the St. Johns suggestion. Just my 2 cents.