I think the Americans on this board tend to be more broad-minded than many others. The US is such a huge country, most haven't even visited all 50 states. I know I'm still avoiding North Dakota and a few other states.
While I can't say that any of my friends are like this, I have heard just so many Americans say 'Why' should I travel out of the country? Many are scared, ignorant of other cultures and other races (outside metropolitan areas). Most Americans who do travel to Europe tend to travel only during the warm months and then anything longer than a 7 day tour is considered extravagant (because of our 2 week vacation alotment).
Just my 2cents.
On another note, I highly recommend All-inclusive 4/5* hotels in Tulum Mexico sooooo beautiful and a short drive to happening Cancun. I also think Brits need to try some other place other than Barbados.... I've been to Barbados and it simply does not compare with Dominica (not the Dominican Republic) or Aruba or parts of the expanded Bahama Islands, Fiji or Tahiti (for beach trips) . For local east coast US trips from NYC I recommend Newport Rhode Island, Mystic Seaport Connecticut, Nova Scotia (Canada), Boston Massachutses, Maine (Hilton Head), Morristown/Madison, Edison, Atlantic City New Jersey, Atlanta Georgia, Hersey Pennsylvania, Lehigh Rivier PA, Philly Pennsylvania, Amish Country Pennsylvania,and many many others... there are so many places within 3 hrs driving distance!