Here are some examples of personal statements both good and bad.
http://www.studential.com/bio/getps.asp?ps=236&view=subject
http://www.studential.com/bio/getps.asp?ps=1136&view=subject
http://www.studential.com/bio/getps.asp?ps=978&view=subject
http://www.studential.com/bio/getps.asp?ps=628&view=subject
