A couple of my favorite places that I often return to:
1. Atlantic City (I'm with you on this one Jim)
2. Boston (greatest little city I've ever been to.)
3. Cape Cod, Nantucket, Cape Ann (mmmm especially Cape Ann)
4. Vancouver Island especially around Qualicum Beach area.
5. The Thousand Islands (In the Alexadria Bay area)
And a couple of places I've only been to once, but were trully spectacular:
1. London England. (Also Dover, Bath, Oxford)
2. Isreal in the area of Elat...beautiful mediteranean beaches there.
Yes, if you can get to any of these places at least once in a lifetime it is time well worth it!