Graduate / My motivation to become a physician assistant [3]

Don't say becoming a PA is the ONLY fulfilling career for you. Statements like that aren't believable. Say you know that will will find personal fulfillment by doing good or something like that.

While you have made a good case for wanting to continue in meicine you haven't quite made the connection to the PA path. You could just remain a medical assistant. Why not add that you want to contribute more by having some autonomy in diagnosing and treating patients while being part of a medical team and your past experiences have prepared you to make that next step.