↳Click here to read the full article. (http://www.randifredricks.com/blog/post.cfm/human-gene-linked-to-optimism-and-self-esteem)
This is on my reading list and its one of those things that, I believe, need to be read quite a few times before one can truly grasp it 
The article talks like pessimism is a bad thing, but you have to be cynical sometimes to make things better. Perceiving a cup as half empty is more likely to motivate you to make it full than perceiving the cup as half full.
What a optimistic approach toward understanding the article. 
It makes sense to me in what you are saying, but I think the opposite is true for some individuals!