I get the impression from this that frankly, even if the relationships between different types are supposed to be of the same nature (e.g. all the supervision or activation relationships) I'm not sure they're all equal. For example, if you're an introvert you have an extraverted supervisor and vice versa, but how hard can it really be to be an extravert with an introverted supervisor compared to being an introvert with an extraverted supervisor? I mean, introverted functions don't tend to have a lot to do with the outside world in which human interaction takes place, so I don't see many opportunities for introverts to get to use their introverted functions to torment their extraverted supervisees, while in reverse it seems quite simple. All of the other asymmetrical relationships seem to work on the same polarity so none of those issues occur.