I have visited Cozumel and Grand Cayman, Mex.; MoBay, Jamaica; all over Illinois, Arkansas, Louisiana, Colorado, Wyoming, New York, Jersey, Florida, Alabama, Missouri, Mississippi (I LOVE the Delta culture), Kentucky and Tennessee... and I think that's about it.
My favorite by far was Jamaica. The water and beaches were gorgeous, the people were friendly. And the diving there off our catamaran was unequalled.
Next on my list is Tuscany and Ireland, and closer to home, Maine.
As far as what I learned - Water slides in strange countries are dangerous, as are drinking and sliding at Margaritaville. I also learned in Jamaica never to shake hands with anyone that looked like Bob Marley because your hand was no longer empty when you pulled it back -