When I started thinking about wanting to live in a place of my choosing, and a made a list of things that made up the ideal place for me to live, having access to a train based mass transit system was on the list of must haves. In the USA that narrows the list of cities, New York, Boston, Philladephia, Washington DC, Atlanta, San Francisco, LA, Chicago. There are a few other small systems, and increasingly light rail, at street level. Some of these were ruled out as being in too cold of a climate, I interviewed for jobs in DC and San Francisco. DC ended up being the winner. I bought a condo a ten-minute walk from a station.
The idea of living in a place were I didn't need to drive everyday, where I could get around, while sitting back watching the world go by, started with those visits to London and Paris, 30+ years ago.