I don't know how it would be to live in these cities, but here's my list. And pretty much any city is a boon for me, being from a rural area.
Paris -- lived there for a couple of months on a break during my college years, was a nanny. Also got to see lots of smaller cities like Orleans and the like on a weekend trip the parents were kind enough to orchestrate before I left. Love it probably because to date it's my one-and-only overseas trip.
San Francisco & Sausalito
Destin & Seagrove
Traverse City (love the UP but it is COLD there)
Odessa (the only city I've visited that I truly didn't like)