There has been very interesting research over the years discussing what types of personality traits effect the perception of happiness. There is evidence that suggests that extroverted people are happier than introverted people. This makes sense as it has been found that extroverted people are more likely to surround themselves with people, which we know is recommended to depressed people to help improve mood. Isolated people tend to be more depressed than more social people in my experience working with the mentally ill. Other studies attribute happiness with the quality of optimism
There is another study that I found that I find very interesting. It is found in the Journal of Affective Disorders in January of this year. “Personality and the perception of health and happiness” Cloninger CR, Zohar AH. In this study they found that the traits of Self-directedness was strongly associated with all aspects of well-being. Additionally, Cooperativeness was strongly associated with perceived social support which we know is strongly associated with well-being. Another personality trait of Self-transcendence was associated with positive emotions.
Can these personallity traits be developed? The research is not clear but I believe it can. Cognitive behavioral therapy is one way. Another way I forsee in developing these qualities would be through the development of spirituality. I regularly see patients in my practice who have been able to develop these qualities to help them be more happy people. That is why I regularly engage my patients in CBT and also have discussions of spirituality to those patients who are open to it. Many have been able develop these personality traits and others that have helped them improve their perceptions of happiness.