This was everything I could have wanted it to be... especially for the price.
This document is based on the Myers Briggs system of personality classification. It goes a lot further, though, in its stated purpose of instantly giving you a way to play any NPC. In only a dozen pages... no frivolous prose on the theory of "RPG characters" no pictures except the cover. Hey, in the middle of a game, would you want all that stuff in the way of you and a good personality to pop on an NPC.
Let's talk about how they did it. They use a very basic spread of different personality combinations based on a very trusted psychological tool used pervasively. I took it in a medical careers prep college course. It is all organized with simple descriptive phrases, a simple intelligence modifier, and a negative trait associated with each. It even easily adjusts for nonhuman races using Vulcans specificly as an example. This template can be shaped to reflect the races of any fantasy or science fiction. I have never seen a more useful, inexpensive, and slender tool to place in any game master's tool belt.
Lets talk RPG craft. Even experienced game masters will notice they start developing only a handful of 'archetypes' on their own. Unless you are a bit schizo, you always have your own voice in your head. Change it up as much as you can, you will notice over your own gaming career... your name isn't legion. We all have to accept our limitations. This one product will make you a personality Plastic Man. For those serious about the art of RPGs, that is a wonderful thing.
Give this product a chance. It doesn't even cost a full dollar. If you use it in one game and flesh out eight NPCs with it then you have got your money's worth at about 10 cents per NPC.