USMC Drill instructors are without a doubt some of the most professional Marines in the Corps. Most Marines remember their USMC Drill Instructors not because they were mean and loud but because they pushed them to where they had never gone before whether it was physical endurance or mental endurance. They know that these Drill Instructors changed their lives for the better.
Marine Corps Drill Instructors go through a very thorough screening in order to become Drill Instructors. Candidates to become Drill Instructors have to prove they have what it takes to change average people from the civilian world into United States Marines who must uphold the traditions and high standards of the Corps. USMC Drill Instructors take pride in knowing that in their shoulders rest the responsibility of providing ready Marines to the Fleet making sure they are ready for any task assigned.
Most Marines would say their DI's were the best Marines they have ever seen. Drill Instructors strive for perfection at all times, they may not show any weaknesses at all in front of recruits. The recruits learn by example what it is they must strive for and Drill Instructors make sure only perfection is observed by recruits at all times.
USMC Drill Instructor Creed
"These recruits are entrusted to my care. I will train them to the best of my ability. I will develop them into smartly disciplined, physically fit, basically trained marines, thoroughly indoctrinated in love of the Corps and country. I will demand of them and demonstrate by my own example, the highest standards of personal conduct, morality and professional skill."