Some physicists' knowledge of computers leads them into the computer industry. Some theoretical physicists use their math expertise for jobs in the world of finance. Some physicists go to work for places such as NASA, government research labs, or defense-related labs. Others become writers for more general audiences, publishing articles or books on popular science, and some even write science fiction. There's a wide range of potential job opportunities.
Physicists have many sides to their personalities as do people in other professions.