It’s a small study, the direction of causation is not clear and it’s about thinking with another person, but still:
It may sound counterintuitive, but people who spend more of their day having deep discussions and less time engaging in small talk seem to be happier, said Matthias Mehl, a psychologist at the University of Arizona who published a study on the subject.
As the authors conclude in their article:
Remarking on Socrates’ dictum that “the unexamined life is not worth living,” Dennett (1984) wrote, “The overly examined life is nothing to write home about either” (p. 87). Although we hesitate to enter such delicate philosophical disputes, our findings suggest that people find their lives more worth living when examined―at least when examined together.