London is beautiful, I really want to go back and spend more time there (I want to visit Kew ASAP for example), but I felt two things very strongly:

- it's extremely diverse, in a way that no other big metropolitan cities I've visited really are (and way more varied and diverse than Paris). You feel that variety crossing a street, where you go from "oh what a nice place with great heritage buildings and all" to "oh I should keep my eyes open, sketchiness has increased dramatically in the past second"

- London during the day and London at night are basically two different ecosystems, love it during the day, not for me at night (too rowdy / wild)