Patrick Stewart once stormed off the Star Trek: The Next Generation set, which highlights a particular truth about Captain Jean-Luc Picard. For seven seasons of TNG, Captain Picard commanded the USS Enterprise-D through many adventures, saving the galaxy several times over. Forever stoic, Picard kept himself at a distance from the rest of the Enterprise crew, rarely displaying strong emotions. In the early days of TNG, Patrick Stewart, too, took his job as an actor very seriously. Stewart opens up about this in Making It So: A Memoir, acknowledging that he “could be a severe bastard.”
https://screenrant.com/patrick-stewart-star-trek-tng-walk-off-picard-character/