Soldier of Misfortune

Pick an alien-infested planet, annihilate every last critter that dares to breathe in your vicinity, jet off to the next, rinse and repeat. As a crack stormtrooper of the Federation (or Soldier of Light if you prefer) you'll casually take the Empire's feeble assaults in your exoskeleton-enhanced stride. If anyone tracks you down following retirement from active duty, just change your name to Xain'd Sleena and shrug in befuddlement.