A good disposition is a very important attribute to enjoying a happy life. It is the only way that you can get along with people.
It is a law of nature that if a person projects a belligerent attitude wherever he goes, people will respond in one of the two ways: Avoid him or answer him back with a belligerent attitude. On the other hand, if a person projects a kindly attitude wherever he goes, people will like him and project back a kindly attitude. Which would you rather choose? I choose to continue to have a good disposition.