I've worked in admissions for 18 years. The most memorable, for all the wrong reasons, was in the format of a printed book called "Chelsea's* Self-Agrandising Dictionary".
It was a dictionary where every word was used in relation to the applicant. E.g.
Ambition - Chelsea's greatest ambition is to study X at University Y
Dedication - Chelsea has shown great dedication to her studies
Joke - Chelsea hopes the admissions staff appreciate her joke
They weren't even definitions. Just using each word in a sentence and mentioning herself.
*Not real name, obviously