I would describe myself as a pessimist so I was mildly pleased when I came across this article which suggests being grumpy could be good for you. Apparently being grumpy makes you better at decision making and less gullible whereas those annoyingly happy people tend to make more mistakes because they are more inclined to believe what they are told. The findings come after a psychology expert studied the effects of positive and negative emotions. He found that when you are more grumpy you get more problems sorted out and make less errors. This works quite well with my way of thinking.
