What is your favorite city in the United States?

I have been to every single state in the uSA because of my hubby used to have a job where we traveled and the city I loved and still do is Louisville Kentucky. I do not know why I am from Indiana ,but the people there nice, it is so easy to get around. I think that is one reason I love it so much because i learned the city so quick and can get around it . So much to do there too.