This is an excellent introduction to this area by an emerging expert in the field. I highly recommend as a starting place for diving into happiness, meaning, and richness.
“What does it mean to live a good life? This question has been debated and written about by many philosophers, thinkers and novelists throughout the course of humanity. In the field of psychology, two main conceptualizations of the good life have predominated: A happy life (often referred to as “hedonic well-being”), full of stability, pleasure, enjoyment and positive emotions, and a meaningful life (often referred to as “eudaimonic well-being”), full of purpose, meaning, virtue, devotion, service and sacrifice. But what if these aren’t the only options?
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Recent research on psychological richness has found that it is related to, but partially distinct from, both happy and meaningful lives. Psychological richness is much more strongly correlated with curiosity, openness to experience and experiencing both positive and negative emotions more intensely. But is the psychologically rich life one that people actually want?”