Personality is defined as all the behaviors and characteristics that make up our identity. They can be influenced by our genetic make-up, envoirnment and culture. According to personality theory set forth by Gordon Allport, there are 3 types of traits: cardinal traits, central traits, and secondary traits. This theory is one several personality theory examples.
Cardinal trait is a behavior or characteristic that dominates a personality and identifies that person. e.g. Mother Teresa (altruistic religious service) or Don Juan (lover). Central traits are ones that if asked to describe you, your friend would list five to ten things to describe you: generous, caring, lazy, strong, etc. Secondary traits are traits that are present under certain circumstances, such as biting fingernails when nervous, likes Chinese food, jingles his keys right before he gets in the car, or doesn't shut off lights when he leaves a room.