The stereotype, which I'm guessing originated before my time, had the finance guy as a huge, always on the phone shouting, mercedes with the roof down driving, bespoke clothing wearing, machiavellian prick.
There are definitely a lot of pricks around here, but honestly most of them are quite bearable. And their prickishness usually comes from just being loud and boisterous, rather than actually having any malice.
However the stories I've heard from law firms, the backstabbing, the scheming, the lying, the judging. The snobbery is apparently especially bad, but people in high finance generally out earn those working in law and yet this problem doesn't really seem to exist here. The law students back at uni did seem to be more up themselves than your standard student though, so I suppose that way of thinking just continues on into the workplace.