The Big 5.....psych personality model.
Jordan Peterson recently acknowledged in a forum that for a long time he didn't believe in the Big5 model, but over time had come to believe it to be the most informative model. The bare skeleton is that there are 5 personality types, openness to experience, conscientiousness, extraversion, agreeableness and neuroticism. Beyond this I say nothing, except that the types can be remembered by the acronym CANOE