[Uberfuhrer]

I've come to realize that Extraversion vs. Introversion are also tied to actual functions, with S and F being more extroverted and N and T being more introverted. When you think of modern definitions of introversion, S and F both tend to be outwardly directed, while N and T are internal.

N and T functions also tend to be negative-to-neutral in their thinking. The N by its nature is unhappy with the way things currently are and wishes to change things or escape the outer world into their own world. The T has the most realistic bent on life, which could manifest as negative thinking.

(And Jung did view Introverted Intuition as true introversion.)

S and F functions tend to be more joyful. The S is happy with the way things are and has the least trouble with making the best of everything. In the same way, the F is humanistic and diplomatic, which makes them more pleasant.

I'd say that Extraverts are more forceful while Introverts are more receptive.