" ... some people are biologically predisposed to be not only more 
conscientiousness but also healthier. "Not only do they tend to avoid 
violent deaths and illnesses linked to smoking and drinking," they 
write, "but conscientious individuals are less prone to a whole host 
of diseases, not just those caused by dangerous habits." The precise 
physiological explanation is unknown but seems to have to do with 
levels of chemicals like serotonin in the brain."

http://www.nytimes.com/2011/04/19/science/19longevity.html?_r=2&pagewanted=all


"People Who experience mood swings, fear, voices and visions"