I have two black cats who are really dopey, but very friendly & a bengal who is absolutely insane.
I have to say my mothers tortoiseshell cats are very unpredictable, they'll be purring one minute and biting the next.
That's what I find. My black and White cat falls off things and is very dopey. Never met a Bengal but very pretty. And yeah every tortoise shell I have met is exactly how you described...very likely to turn on you haha. I do wonder if it's genetics or just a coincidence...a lot of people say that with animals it's how they are bought up and not their breed.