In the first article of this series I already described how Insights discovery divided people into 4 colours: red, yellow, green and blue, through the preferences for extraversion versus introversion and thinking versus feeling. In part two it was described how adding the preference for intuition and sensation makes it possible to go from 4 colours to 8 roles. The next layer in the personal preferences makes it possible to split each of the 8 types in two again, creating 16 types. We use the…