The personal statement is also a great place to explain more serious problems, like less_than_ideal grades or test scores. Don't be afraid to write something like, "I don't test well" in the statement. As long as you can provide a good reason for you app's problems, it's okay to address them directly. You won't be able to hide it from admissions officers anyway, so providing a reason for problems is always preferable to ignoring them.
Sell Yourself Your main goal is to sell yourself to the medical school, but do so in a way that is not arrogant. You must strike a balance between selling them on yourself as an applicant and not sounding cocky or pompous. The mistake people often make is that they think selling themselves involves listing grades and honors. It does not. Rather, it involves telling the reader about you as a person. Remember, the admissions committee already knows how you look on paper, they now want to know who you are. This is the place in your application where you have freedom. You can be humorous, you can be serious, or you can be philosophical. The key is to just be yourself. Let your personality shine through