Non-continenal US: Alaska
Canada/Mexico, of course, you only needed your driver's license in the 80s & 90s, & many times since w/passport
Dominican Republic
Brazil/Brasil - wife is native, many times. Sao Paulo, Santos, Campos Do Jordao, Porto Seguro, Trancoso, Peruibe, others.
Europe: France, Germany, Spain, Italy, Belgium, Netherlands, Switzerland, Austria, Greece, Czech Rep
No longer Europe: UK
Wants to be Europe: Turkey
UAE - Dubai/Abu Dhabi
Qatar - Doha
Favorites: Turkey, Czech Republic, (Rural) France, (Rural) Germany, in no particular order
Most overrated: Italy. I mean it's fine, just overcrowded and overrun with Americans. I don't travel internationally to see a crapload of Americans everywhere.
2nd most overrated: Mexico, seaweed on the beach all the time.
Most underrated: Trancoso, Brasil. Really enjoyed. Roads are bad though, but not really a problem.