I am completely, totally and obviously an optimist. Pessimists and people who always look at the dark side of life drive me crazy. I just want them to be happy...or just happier and it drives me nuts that I can't fix that.
This article (click here) suggests that pessimism is actually a result of fear rather than just plain old negativity. That changes everything I ever thought about pessimists. Don't worry, be happy now becomes don't be afraid, be happy.