Emotions and Decision-Making

Insights on Anger, fear, and escalation of commitment
via strategy-business.com
“…angry employees are more likely to commit further resources to a failing project or choice. By contrast, fear makes people second-guess themselves and often abandon support for efforts that have gone even slightly off the tracks.”
OK. What happens when you have other emotions like sadness, joy, or just plain happiness? Do you make stupid decisions when you delude yourself? Or does a cynic make better decisions?