Restraint or Expressiveness? Advantage of each

I grew up in the Jewish tradition, in which expressiveness was encouraged. In contrast, this year, I’ve read three books presenting the opposite. In A Man Named Ove, a Swede so prized keeping his feelings to himself that no one had an inkling that he was planning to commit suicide, down to where to hang the rope. I also read three books, Kafka on the Shore, 1Q84, and Geisha, which showed the Japanese culture’s venerating restraint.

Some of expressiveness or restraint may be cultural and resistant to dramatic change but doubtless, some volition remains. So, in the service of your considering whether to become more or less expressive, my PsychologyToday.com article today lists restraint’s and expressiveness’s advantages.