Wan Chai. Once I got past the first-time sense of "This is so different from Yokosuka! How do I find my way around this huge place??" then it become kinda cozy in a weird way. It's not Yokosuka cozy, but I liked the vibes you get from each district, I like having to pay rent, etc. It's still a slice of life, but the approach to it is different and interesting in a way that Kowloon didn't really manage for me, not helped by Kowloon having smaller quarters that all felt pretty similar.
Aberdeen is small, I'm not as fond of the music there, and I'm not as taken by the architecture. As for Guilin, I like it, but obviously the game handles Guilin very differently than any other area in the game, and it isn't visually impressive in the same way it was at release. Guilin's aesthetic holds up fairly well, but is undermined by dated visuals that look worse there than anywhere else in the game.