Mallorca. It's not a city, though. It has beautiful beaches and mountains and it's an island! Small island with a lively city. And because there are so many stray cats I could be the cat lady there [emoji4]
Have lived in four cities (Singapore, Hong Kong, 2nd tier city in China and now Southern Spain), I am convinced that I am very much a city girl. So, it would be Hong Kong in Asia or London or Bangkok.