It had everything, insanely good transport, safe, some of the best food in the world, beautiful weather most of the year except for rainy season, incredible art, great mix of old and new, some beautiful parks, great for riding bikes, little traffic, clean air.
The only thing I’d say let’s it down and it does let it down a bit is the lack of greenery. I think it’s a known issue though.
It’s honestly the best city I’ve ever visited and I’ve been to a few.
New York is a close second for the history but it’s so dirty that it’s beyond charming.