Capricorn! A lot of people I can get on well with are Capricorn. I still can't figure out why. Maybe it has something to do with my Neptune conj MC? I don't know. I'm a Gemini but sometimes I find Gemini people obnoxious with their inconsistency (I'm talking about the handful of people I meet irl, not people here on this board).
I like Scorpio, but only as a concept. The Scorpio sun people I met are so full of themselves, as if they are the God of this world. I just can't bring myself to like those Scorpio despite my liking to the Scorpio sign.
In fact, two of the people who hurt me the most were a Gemini and a Scorpio. They were both super abusive and into mind game. The former manipulated with false logic, and the latter manipulated with power.
But then again I'm using Sun signs here. I'm sure there are more in their charts, like bad aspects to Pluto. The abusive Gemini was born only a day after me, so I can see some power issues in their chart. I wonder what's more in the chart of the people I can't get on with.