I love being anonymous, so an unfriendly city doesn't bother me in the least. I enjoy people watching in a huge city, but I don't really go to see individual people - it's the dynamism of the city. I'm also an amateur historian type, and spend a lot of time chasing ghosts. I love knowing some of the things that have happened in places, and imagining how they really were when I stand in or walk in those places.
I like a city where you are ignored and left alone. I found people friendly enough, outside of the wealthy areas. I had more interesting conversations with locals in Florence than in London, for certain, but they were about the art, and with younger people who wanted me to look at things they loved. London has a bad case of alienation - people who act detached from everything but the pursuit of money and the secret (to me) code of labels and status shopping. A lot of people seemed to buy shopping bags from expensive, high status stores so they could carry them around and look 'successful'. But to be fair, a lot of those people are tourists.
It can be like watching an aggressive fish tank, but there are lots of genuine people scattered through the predator and fin flaring stuff. Strutting and preening are everywhere. So are smart people. I met a guy selling vinyl records from a temporary street market barrow, and we had a fun conversation about blues music, and about how he'd recently noticed a hook from a 1920s recording in a Taylor Swift song. He was a guitar playing amateur historian/musicologist, and his thing was tracing things to their roots. Fun. I try to do that too, so we got along.
I see so many people these days falling into rigid ideologies and ungrounded theories, and a lot of them could use a lot of travel and listening to people who think differently to get their minds out of the weird ruts they've settled into. It's great to appreciate your own place, but you really should see other societies,values, solutions, failures etc. In my world view, everyone should travel, study history , keep fish, read and listen.
I met an Englishwoman who had to be close to 90, visiting Florence for the first time and tapping her cane with excitement as she set out alone on her first walk over to see some Michelangelos. I admire that.
I can't figure out how to travel and keep fish at the same time though.