Mmmmm...I would say I'm one of these people, and my husband too. Not suffering fools gladly is exactly how I'd describe him.
On the other hand, he's kind, patient and will put up with a lot of bullshit until he calls people on it. When it comes to me and his family, he will not tolerate any kind of bollocks from anyone. He's a Scorpio. The sting in his tail hurts like nothing else but he doesn't really use it until he has to.
I am always the first person to call someone out on something - a dodgy joke, questionable views etc. I challenge people all the time. I'm really outspoken. I get passionate, really passionate about things and hardly back down if it's important. There's someone at work who I adore, but we have VERY different moral views on certain things. We have had stand up rows before, because we're both so passionate about whatever we're arguing about. But he's like me - he's not afraid to wade in with all guns blazing.
But. I have zero interest in upsetting someone. I have no interest in manipulating a group of friends or work colleagues. I want people to like me, I care about the people I know. I would never, ever employ the full intensity of my arguing skills if I see that person can't deal with it, doesn't like confrontation or whatever. I don't actually want to upset anyone or feel like I am imposing my views on anyone.
It's simply that - if I hear someone I either disagree with intellectually, morally, ethically etc, my mouth is open before I even know it. The difference though, I think, between people like me and my husband, and the manipulators being discussed on this thread, is we're not afraid of being challenged either. I actively love a good debate and most of the time - maybe to some people it looks like a row but actually, I'm thoroughly enjoying the heated discussion. But it only works if the other person feels the same. I would never, ever, ever, carry on if I saw the other person was getting upset or felt anything remotely like being brow-beaten or god forbid, bullied. I would hate that and feel so terrible.