Of the four american cities I've been to, San Fran > LA > Baltimore = DC.
EDIT: I lied. I completely forgot that I've been to Seattle before. Ill throw Seattle in tied with LA.
New York City
@Dal - I hate Baltimore. fwiw
Fortune and glory, kid. Fortune and glory.
I like houston although its where all my friends are. Its not a town to visit, you have to slowly unlock its treasures. Kind of like posts from beantown, its not for everyone, and at times can seem dense and a little annoying, but if you give it a chance, it gets a lot better over time.