Researchers from Northwestern University sifted through data from more than 1.5 million questionnaire respondents to find at least four distinct clusters of personality types exist — average, reserved, self-centered, and role model — challenging existing paradigms in psychology. Read more here: https://news.northwestern.edu/stories/2018/september/are-you-average-reserved-self-centered-or-a-role-model/
The personality types are based on 5 widely-accepted basic character traits - you can run a simple test created by Jordan Peterson for Dr Oz here: https://www.doctoroz.com/quiz/quiz-whats-your-personality-type?quiz=true
The simple test is more manageable than the full 100-plus questionnaire.
Video: Dr. Jordan Peterson Shares a Quiz to Help You Accomplish Your Goals:
From Cambridge University: