Optimism

Optimism is a trait that should become more common, judging by Winston Churchill's famous quote that "a pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."

 Optimism has been proven to improve the immune system, prevent chronic disease, and help people cope with the unfortunate news. 

Gratitude is associated with optimism and has been determined that grateful people are happier, receive more social support, are less stressed, and are less depressed.
Recent research indicates that optimists and pessimists approach problems differently, and their ability to cope successfully with adversity differs as a result.