I have no idea what the practicalities of a life in Paris are, but it's still at the top of my list. In maybe half a dozen visits, I've found Parisians to be quite friendly for city dwellers (very much counter to the stereotype). If I approach situations in my severely broken French, people figure out quite quickly that their English is better than my French, and like most everywhere else in Europe, nearly everyone under 40 speaks excellent English.
Maybe it's one of those things that looks better to an outsider than it is, but the pace of life is very attractive to me.
I'm far less surprised that nobody has mentioned Chicago, but it's not bad here. For a large city, it has most everything I want: great art, great restaurants, etc. The cost of living here is obscenely low relative to NYC or SF. For far less (monthly rent vs. mortgage payment) than friends who rent one bedroom apartments in either city, we own a modest, but very nice detached house in a nice neighborhood smack in the middle of the city.
Between the recent dramatic uptick in shootings and the truly shitty weather in the winter (though spring and summer are glorious), it's pretty hard for it to bubble up to the top of anyone's list.