I made a career change into sales and trading for a while, then went back into full-time medicine - finance is a really interesting subject, but the proportion of assholes in sales and trading is
much higher than in software, medicine, or most corporate jobs (all of which of course have
some proportion of assholes).
That's not to say that people in that industry can't be charming - they totally can be, but they will also do whatever it takes to boost up their reputation (and therefore their annual bonus) at your expense. "Liar's poker" is a pretty accurate description of the culture, but it's much worse when you have to deal with it every day.
My experience was on the sell-side, things may be different on the buy-side. Feel free to message me if you want to chat.