Time did a “One Day in America” special report, which contained an entertaining and simultaneously depressing segment on average job happiness: http://www.time.com/time/2007/america_numbers/job.html. It provided a more comprehensive approach than the reiteration of the fact that dentists are most likely to commit suicide, and air traffic controllers have the highest stress levels. Shocking, I know.
With so many grouchy New Yorkers, I am dubious of the results. However, I figure that the severely-under-caffeinated-late-to-work-suit would have had no time to stop his or her busy life to speak to a member of the smiling, survey-waving corps.