That face looks less like Phlegmatic and more like Frightened.
That face looked perfect to me. The Phlegmatic is just plain in description. They eyes are just drawn as vertical rectangles.
Of course, all five faces are represented in my avatar.
Also, your temperament for the most part matches the type you're going with now, But still, you always seemed more N (and E) to me.
Also, should point out that even with this table, INTP's are apparently going to tend to identify with Melancholy in Control ("I don't control you, so don't control me") more. I probably would if I had seen a table like this first.
But again, this is subject to the influence of the Inclusion temperament, which
tempers the Control. I believe NT's are really Choleric in Control, which fits their characteristic need for "mastery". However, INT's likely won't start out
approaching others saying "I'm the boss!" Because their expressed
Inclusion is low, (represented by the I), and this is what determines how they approach others. If they're also a P, they introvert their judgment, and tend to be more open in the external world, so this will further temper the "bossiness".
It's
once they're in a relationship, that the "I'm the boss" tendencies will surface more. That's how this table is to be read. The first column tells you who's in the relationship, and
once in the reationship the second one then tells you who makes the decisions, and this can manifest as simply how much one needs to have one's own way, even if it means choosing not to make decisions is they can't do it their way.
(Which is what happens with me a lot).
So, Phlegmatic in Inclusion means you can take people or leave them. So you (@OP) will tend to not approach many people, and be passive or noncomittal with them, so you won't appear to have an "I'm the boss" attitude a lot.
Then, Affection tells you how you are when the relationship becomes deeper, or at least how deep you want it to be. So Supine is going to be even more passive and agreeable than Phlegmatic. So this even further tempers the Control. (And it's the deepest level of the person?s temperament, and according to the FIRO theorists, the thus most important).
So this is why these methods aren't the most accurate (the actual test is), and can only give an approximation (though they seem to be close for most!)