Yes, thank you! That conversation made me think of this a lot as well. Objectively, in Paris, we had good food, met nice people, and saw mostly beautiful and interesting things (save the massive and overly familiar rat by Shakespeare and Co, lol) but none of us are eager to return, though not unwilling. (I am "eager" in the sense of being interested in how I would process it differently, but I don't know if the brain is very good at prioritizing second impressions above first ones. Confirmation bias and all that.)
The more I consider our last trip, the more I think the reason I could see myself living in Rome is because we spent the most time there. The more I read, the more I see short stays correlated with dislike and disappointment. Runners up may be bad weather and "rude" people?
I don't deny the existence of (sometimes exceptionally) rude people. (There's a special place in travel purgatory for those that travel with two rollies and stroll through the airport with one on each side, both arms extended to max wingspan while they obliviously weave around, blocking a large terminal walkway, lol). I prepared myself for all the rudeness in Paris, but never found it! I did find different priorities, lots of which make sense. I found that the French do not move aside on sidewalks. I've noticed many travelers gripe about this no matter the country, but I did not find it to be at all malicious, simply a matter of course... a traffic pattern, if you will. In Italy, if you, a young person, are oblivious to an elderly person boarding the bus, that person will put themselves in very close proximity to your seat an look right at you til you take the hint. But, in that culture, it seems your youthful, oblivious rear end in the seat is the rude one, no?
Meanwhile in Paris, it seemed it was rude for young people to stand up on metro, holding onto bars and jostling about and chattering and taking up space. They ought to sit down, for pete's sake!
My daughters were appalled at the comfort Italians had with "staring" (what I would call, simply, "looking"). In the US, it seems if you gaze at someone, you will get a scowl or even a "What are you looking at?!" They dissolved into giggles when someone would walk by and actually turn their head as they passed to continue looking at someone.
I am interested in the aspect of sheer alchemy in which people give places their time and attention, but find they simply do not connect, or even more, when some deep invisible connection is formed. I don't feel like it gets discussed as much as people think it does, because it seems it usually boils down to bad weather and rude people, lol.
ETA: I find I quite agree with Agnes, but counter with the idea I mentioned about confirmation bias. It's awfully hard to like somewhere you have already decided will disappoint. The mind seems to corroborate your decision. Low expectations with a sunny outlook might just be the ticket?