The 1 rarest personality type is the INFJ (Introversion, Intuition, Feeling, Judging) personality type. This type is estimated to make up only 1-2% of the population, making it one of the most rare and least understood personality types. INFJs are highly sensitive and creative individuals who are often drawn to helping professions, such as teaching, counseling, and nursing. They have strong intuitive and empathetic abilities, as well as a deep sense of understanding of the human condition. INFJs are often described as passionate, idealistic, and complex individuals who are driven by a strong sense of purpose and meaning in life. They are often seen as “old souls” who are wise beyond their years.