From The Guardian:
Researchers have found that while levels of subjective wellbeing initially rise as free time increases, the trend does not necessarily hold for very high levels of leisure.
“The sweet spot is a moderate amount of free time,” said Dr Marissa Sharif, a co-author of the study from the University of Pennsylvania. “We found that having too much time was associated with lower subjective wellbeing due to a lacking sense of productivity and purpose.”
Writing in the Journal of Personality and Social Psychology, Sharif and colleagues reported how they analysed results from two large-scale surveys, involving a combined total of more than 35,000 participants.