Every one has a different personality. I have an optimistic personality and I always do everything happily. But not every one finds this easy. When I meet people like this, I usually advise them to see the school councilor. There are reasons why everyone"s personality is so different. If your parents love you and care about you, then your personality will be healthy and happy. If your parents don"t, then your personality could sad and withdrawn. A person"s personality determines his or her future. So if you come across someone who is often worried, you can try and help them or tell them to seek help from a councilor.