probably paris it is very carefree and you see alot of styles around apart from the obvious b. i just love the french way so i am partial
but of all those cities what is prominent to me is the mostly neutral colors. i said it before and will say it again in new york the upper east side for me in one word is beige! beige hair- beige clothes -beige homes- beige everything and by beige i do not mean neccesarily the color lol )no offense please i also know a lot of fabu new yorkers just my little limited view as an outsider
london well it depends but i found the most birkins(and mostly birkins less other h) to be with non-british people aka non dimiciled status londoners kwim? but that is not a clear objective picture as i only live there durin summer and have not very much to do with british people.
but globally i think there is a cultural and also climate reason behind the different preferences the farer east you go the more colors unusual combos and gaudiness(in a positive way) you see . i hope you get what i want to say ?
i see it on myself i do have a special "european wardrobe,jewelery and bags " that are much much simpler in cut ,size ,color, material, daringness etc than the things i wear in my home town or my birth country (yes i know i only wear black and white but yes there are differences lol) it is like it is still me - but with less glam, less ott more elegantly suburban lol