What I mostly would like to point out is the similarity of the PAEI model suggested there and the DISC model.
Where
D is similar to Producer, Lone Ranger
I is similar to Entrepreneur, Arsonist
S is similar to Administrator, Bureaucrat
C is similar to Integrator
Ichak Adizes "The Ideal Executive"
This reminds me of an old joke told by a consultant:
"There are two kinds of people in the world: those who divide the world into two groups, and those who divide the world into four quadrants."
"And," he then said: "Now you know which group I'm in."