that is a thing, for sure. some people are.
we've found that it's largely about what seems normal, what kinds of behavior seem acceptable. there's very small signals that are easily picked up on by people with shared history around this stuff...
then there's red flags, too, stuff that is unambiguously misbehavior and not simply unusual, which people who've never known anything else tend to not notice, though anyone else would
we don't actually buy into the concept of personality disorders as a diagnostic category, we think it's oppressive bullshit. there are people who meet these criteria who we do count as friends. we don't automatically run away just because we notice this stuff. we have elements of it in common, even, and it can be nice to be able to relate, since it's not as though we can fundamentally re-wire our brain to work in some other way.
but then, we also don't treat our own survival as a top priority in the way that humans do. so it's not necessarily advisable to be like us.
we do encourage building an awareness of what the signals and the red flags are. knowledge is power. what to do with that awareness, though, is a thing that everyone kind of has to decide for themselves.