Hi Femtochemistry,
Your personal statement is your first and best chance to reveal your personality to the admissions committee. The AAMC says, "Medical schools review candidates qualifications in four areas: personal qualifications, academic qualifications, communication skills, and motivation . . . Integrity and responsibility assume major importance . . . Medical schools also look for evidence of other traits such as leadership, social maturity, purpose, motivation, initiative, curiosity, common sense, perseverance, and breadth of interests.? The topics are generally less important than what you reveal about these areas through the topic.
Like efex101 said, don't recap your resume. So many applicants write a laundry list of their accomplishments, basically reiterating what they've listed as post-secondary experiences. A better approach is to write a human interest story, taking an in-depth look at just one or two of these experiences and showing how you felt about the experience, how it impacted you, and how you grew as a result. You might want to look at some of these
sample essays to see what they did.
The key to a great essay is attracting the admission committee's attention with a great theme that unifies the entire essay and specific, illustrative examples that demonstrate the qualities that they're after. That, and of course,
revising, revising, revising -- it's not an easy task, but it's definitely worth the investment of your time.
I hope this helps you get started. Good luck!