Have quit and moved back to my home city but i was working in investment finance.
I liked that it was challenging and tbh at first it felt quite cool going to Canary Wharf or whatever, and the money was good. I also mostly liked the people. With most jobs it's the people I liked most.
Disliked that there was a lot of pressure and it was stressful. Plus I prefer the kind of laid back and social cultures you get in start up or more techy firms. Ultimately it also didn't really make me happy. It was fine, but not what I really wanted to be doing.