Personality, is how you would behave in front of people in a sense that brings you satisfisfaction. Usually, persoanlities change due to circumstances befall upon. Personality, is not the 'real thing' to judge on humans' strength; it is "character".

By the person's behaviours you understand the personality

personality describes your self. Not in appearance but in how you feel about your self and how you associate.

yes your outlook is not important your behaviour is most important in your life and personality