The simplest and most important thing you can do to improve your Why School X portion of career goals essay is to personalize any and all content.
What do I mean by "personalize?" Simple: make anything you write about the school specific to you, your experience, your desires, or what you require from a program. Never just state absolutes, generalities, or even known truths and facts - always make them personally-held viewpoints. Examples are the best way to understand this (after the jump):