Write the first draft from this, then try to find an angle or a hook which can sink into the admissions committee; a good place to start is with an original and provoking opening paragraph. One of the worst things you can do with your personal statement is to bore the admissions committee, yet that is exactly what most applicants do. Admissions committees see thousands of "I have always wanted to be a..." opening paragraphs, so a good way to make the essay more interesting is to write about an anecdote or memorable incident that led you to choose the particular profession. This can help add drama, vitality, and originality to the statement. It is important, however, that the anecdote is related to the questions asked and not just a retelling of a catchy life drama.
Quotation Introduction: Many writers are tempted to start their essay with a quote. You should try to resist this temptation, as most quotes will look forced. Admissions officers will be turned off if it is apparent that you searched through a book of famous quotes and came up with a quote from some famous philosopher about whom you know nothing. The quotation introduction is most effective when the quote you choose is unusual, funny, or obscure, not too long, and from those to whom you are closest. Choose a quote with a meaning you plan to reveal to the reader as the essay progresses. The admissions committee is interested in how you respond to the quote and what that response says about you.