On the other hand... My aunt is an evil, passive aggressive [XXXX] who acts sweet, but then she will stab you in the back like all [XXXX] when you really need her the most. I've given up on people of [XXXX] type. You know Hitler was an [XXXX], and that means that everyone of that type is a little like Hitler when they are pissed off.
That approach to typology wearies me and at times makes me think I should give up on it because it isn't useful and only adds to the negative social soup of overly defensive interaction. The motivation is to take the experience of personal hurts, try to make sense of it in a way that future hurts can be avoided. If [XXXX] are people who have caused personal pain, then avoiding all such people in the future, or being extra wary of them, will prevent future pain. It is like a Golden Retriever who hates little blond boys because one pulled his ears while a puppy.
SolitaryWalker, your approach is at the other end of the spectrum. I think sometimes people don't know how to bridge that gap, and don't have a toolkit for approaching typology in another way. It could be useful to have a thread that examines different ways to approach this topic because there is something worthwhile in keeping it theoretical rather than distorting it based on personal fear and bias. This could include suggested reading among other things.