Myers-Briggs Type Indicator (MBTI) is the thing with Extraversion (E) versus Introversion (I), Sensing (S) versus Intuition (N), Thinking (T) versus Feeling (F), and Judging (J) versus Perceiving (P) personality typecasting. I remember grabbing lunch one day with Brad Coffman and Bryant "Poff" Poffenberger during the @hand days and they were off on a tangent about this. I have not heard of Five Factor Model (FFM) but it seems to try to figure out if your personality is one of Openness to experience (inventive/curious versus consistent/cautious), Conscientiousness (efficient/organized versus easy-going/careless), Extraversion (outgoing/energetic versus solitary/reserved), Agreeableness (friendly/compassionate versus challenging/detached), or Neuroticism (sensitive/nervous versus secure/confident). OCEAN and CANOE are acronyms for the five things. In chapter 1 of "ASP.NET Core 2 and Angular 5" by Valerio De Sanctis MBTI and FFM are namedropped as the sample app that will be made throughout the book will be one of a free personality test (testmakerfree.com). I feel like I've already joined the Scientology cult! Xenu!