That's funny to me, because for me it's the opposite. I mean, if someone wants to spin a theory about which interrelations are better than others, fine--that's been done and will continue to be done. But I can only speak of my personal experiences thus far. It doesn't mean I think what I say will apply to other people--or that it will even continue to apply for me.
I semi-consciously rank all my interpersonal relationships anyway, more or less as I did here, but without applying types to them. The inner circle, the mid-circle, the outer circle, and the messy rest of it.