a question of self

A friend once told me that I am - without doubt - an introvert. And I kinda just swallow it, and accept that as my reality. Whenever people asked me about my personality, I answered "well,I've heard that I'm an introvert. True or not, you'll be the judge". But I cannot recall whether I ever actually did the personality test. Now here I am - 4 am in the morning - decided that I should at least give it a run before coming to that conclusion.
Jung Typology Test INFP - Introverted Intuitive Feeling Perceiving Famous people of your particular type Princess Diana, Michel de Montaigne, J.K. Rowling, Anton Chekhov Jungian Type Test INFJ - Introverted Intuitive Feeling Judging Careers Counselers, clergy, missionaries, teachers, medical doctors, dentists, chiropractors, psychologists, psychiatrists, writers, musicians, artists, psychics, photographers, child care workers, education consultants, librarians, marketeers, scientists, social workers.. Blessed with an idealistic vision, they do best when they seek to make that vision a reality.
Let's just say that if I want to be the next J.K Rowling,  I would need to define my idealistic vision first. So let's jot down the list: world without war... greener environment.. and oh why of course, Dokodemo door. Yes, that would be ideal.