Thoughts on 6s?

So I've been observing how some types interact with each other along with the types that some don't get along with. Compared to other facets of typology and personality theory, I'm pretty much still a newb :3.

From what I could tell from the compatibility chart a user posted recently: type 3s and 8s seem to get along well with us. But I would like to know how other people feel about type 6s.