What makes "interesting projects" a good way to measure happiness? Within the workplace there must be many more factors that can influence happiness like relat

What makes "interesting projects" a good way to measure happiness? Within the workplace there must be many more factors that can influence happiness like relationships with coworkers and superiors, and then there's personal lives etc. The world happiness reports come from the data in these surveys, they look at a lot of different things - http://www.gallup.com/poll/105226/world-poll-methodology.aspx http://www.gallup.com/poll/105226/world-poll-methodology.asp...