People
The vast mass of the average. Their minds little more than a tedious litany of likes and dislikes, and a few tired schemes relating to them.
I suppose one can only divide people up, meaningfully, by the nature, complexity and subtlety of their likes (concrete and abstract), the schemes they invent (versus imitate) to get them, and the amount of time they spend contemplating them instead of their dislikes and the dark dreams of foiling their nemeses (real or imagined). What else separates us? Superficial appearance, and little else.