INFJ — the rarest personality type that makes up only about two percent of the general population. Caring, nurturing, understanding INFJ men and women often seem to understand us better than we do ourselves. The rarest type among men and the third least common type among women, we need more INFJs in our lives! Learn about the INFJ personality type, based on the Myers-Briggs Step I assessment. Find out their strengths, development areas, characteristics, careers, stress and relationships. Discover the strengths, weaknesses, unique traits, and more about the INFJ personality type! Written by a certified MBTI® practitioner. The INFJ personality type is Introverted, iNtuitive, Feeling, and Judging , which means they are energized by time alone, focused on understanding ideas and concepts, led by their values and intuition, and firm decision makers.