> I know of no test that will tell you if they're a good fit for your company, which is arguably more important than their skill level.
I'm beginning to see it the other way around though. My manager has to "get me". I've only met one so far and he understood who I was well enough during our first interview.
He was like "ah I see, so you have lots of different skills and you want to go into lots of different directions. Awesome! I think we can do amazing projects together." This was coupled with "during lunch we like to talk about (geo) politics, some science facts, random stuff and self-improvement, those type of things." (note: Dutch company)
Ultimately I noticed he must have a fairly high openness to experience. I think all managers that I am managed by should have that.
Having a manager that knows how to properly employ you is important, sure. I was talking more about how you work with your teammates to get things done.
There's a place for lone wolves at some companies, but in my line of business you have to be able to work with engineers, project managers, electricians, as well as other integrators. Our projects are definitely team efforts. I make an effort to assign tasks based on people's strengths, but if you're hard for my team to work with, you're useless to me and I'll eventually be in the boss' office asking for you to be replaced.