You seem to be lacking a little bit of this in yourself:
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Most of us aren't Rhodes scholars, College Athletes, championship winners, or geniuses. We are the plain vanilla cake of medical school students and we are in every school. But we do want to work hard and excel. Even though you have touched on the broad categories of volunteering, research, and clinical experiences that every applicant has, I assume there are experiences in each of those that should have changed your life/viewpoint. Those experiences are, while maybe similar to others, have unique details that only apply to you. They should be the foundation for your diversity essay and they should be a jump off point for how you are able to be a strong member of any class.
You also seem to like basketball. Make sure to include in your application your avg. PPG, rebounds, and blocks. Also attach any vdieos of sick step back three pointers as well. /joke