Ireland, England, Japan, Italy, Spain, Australia, New Zealand, Austria, China, Indonesia, UAE (Dubai), Canada (mostly Vancouver, Montreal and Toronto), and a shitload of other places for first time visits. In the US: Seattle, Chicago, Detroit (lol), San Francisco, St. Louis, and probably a few others I forget that I haven't been to.
Revisit: Las Vegas, California, New York, France, Germany, Switzerland, Mexico, Texas, Philadelphia, Boston (of course), Washington D.C., the Grand Canyon, Providence, RI., Hartford CN, and shitloads of other places I have been to. Places in Florida and Georgia don't count haha (Atlanta, Tampa, Orlando and Miami). The whole Boston to Washinton DC. megalopolis is worth visiting again really (BOWASH).
I wouldn't want to visit again: Nashville, Tennessee; Waco, Texas (lol); Oklahoma City, Oklahoma; Charlotte, N.C.; and other various places I got bored at really fast.