I agree with tomfaranda. Treat the Caribbean as NYC and you'll be ok.

The one thing that locals in most Caribbean countries (probably the rest of the world) dislike is the cruise shippers and the first thing they do is walk into a busy road, stop and take a picture of the ship they just came off... I'm amazed that there isn't more accidents because of this. If you present yourself as you would in your hometown you'll have a good time.

If your heading my way give me a shout!