Did you visit the schools prior to applying? I'm preparing for '06 and I am curious what you used for "why this school" questions. I have almost the exact list of schools (-darden +UT +UNC).
I used the "How to Get Into The Top MBA Programs" book as my guide even though it is a little outdated. It definitely helped me with the essay questions and how to make the most of my current credentials.
I did not visit any of the schools. I interviewed with a Kellogg alumnus.
For the "why this school" questions:
In each essay I made it clear why I wanted a MBA, how a MBA from that particular school will help me achieve my goals quicker, etcetera.
For example, I mention how Dardenâ€™s case method of instruction will help me solve complex problems for companies in the marketplace
as a consultant after business school... how Tuck's Cohen Leadership Development Program and Leadership Forum will allow me to reach new horizons in both the business world and my community after business school..etc..
Also display what you can bring to table that is different than your future classmates in your essays.