Sample themes: _ Passion for traveling and being fascinated with multiculturalism and globalization; Having received primary education abroad and the experiences gained therein; _ Concern for the current status of your chosen field or industry in one's country; _ Proficiency in the areas of leadership, communication, and team cooperation as advantages; _ Pursuit of excellence; _ Personal qualities such as adaptability, resilience, persistence; and a sense of social responsibility, or Motivation to enhance one's knowledge and skills and the potential to pursue advanced studies.
Another important role of the PS is that it allows you to explain, although briefly, some information that may not be accurately represented by your transcript or Curriculum Vitae. For example, your GPA might be low because your school places a cap on grades given to students belonging to your major. Another example would be explaining the connection between your undergraduate major and your chosen graduate major, which might seem incongruous at first inspection. For these reasons alone, it is extremely important that you follow a guideline in composing your own PS.