The question isn't which cities are your favs, but which parts of ANY city grabbed you in some way. Like I hate LA (sorry) but love Venice Beach. Another example of what I'm talking about would be a certain part of Brooklyn: I like Manhattan but it feels a little gentrified; I'm not a hipster but I enjoyed Williamsburg, Brooklyn a lot - art everywhere, young people...it was just cool. I definitely like Queens and the Lower East Side, and Harlem is pretty cool, but Williamsburg stuck out and is one of my fav neighborhoods I've been to, even if I was a little put off by the island.
Another example would be Condesa/Roma in Mexico City - like a mutant slice of Europe in the new world, so cool. I would move there tomorrow if the pollution didn't give me nosebleeds, haha. Georgetown in DC is pretty tight IMO. Also the Miraflores district in Lima, Peru.
Anyone want to chime in?