All it says is "Write a personal statement?"

I'm guessing they are looking for either what you will add to the school as far as "diversity" or "life experiences," so try and separate yourself from the masses, or what you will add to the profession.

I don't think a personal history recitation is going to make you stand out from the crowd. Convince them that they should take you-be persuasive. Think of it as your first case and they are your first jury (not bad for 2:00 am, eh? [:D])