Your spirit. The real you that you can't see in the mirror. How you feel. How you think. How you act.
The worst personality of those I have come across are those who are aloof and dull with a capital-D. They dont seem to have any sense of humor, or any interest in conversing with people, don't know how to sound like a person of reasonable intelligence and are a person of very few words and thought.
Your personality is what defines you . It's how you act, think, and talk . It's that one things that you don't see when you look in a mirror, but everybody else does . It reflects so much . It's also something a majority of people lack .
Person 1: I have no emotions though..
Person 2: But that doesn't effect the personality I see when I'm with you .