I've got to say that I have enjoyed Boston everytime I have gone. Granted, it was twice, once in October and most recently last May, but I have lived in the NE, so I know what the weather is like. To this day, I don't think I can live in the NE, EXCEPT and this is a big one, for Boston. I would love to live there. The atmosphere rocks, and it is a very collegiate town. Granted the hated Patriots are there, but Boston itself is very awesome. Probably wouldn't have a hard time finding a job there given the hundreds of university.
Another fave was Denver. I love the beach, but I wouldn't mind Denver b/c of the mountains.
As far as international, I've only been to Vietnam, Singapore, Canada, and Mexico. I always love going to Vietnam, especially touring the coast and Ha Long Bay, or going on a trek to the Perfume Pagoda or Sapa. So beautiful. I wouldn't recommend doing it in the summer because it is sooooo hot, but when you get into the magical caves, it's cool and soothing and beautiful. I would like to visit Hong Kong one day, it sounds like a pretty cool place.