Be original and authentic!
From what I've found surveying lots of friends and colleagues that went to schools ranging from small liberal arts schools, to state schools, to ivy league schools, the exact content doesn't matter as much as ensuring that the essay is :
~original and unique
~authentic, honest, and maybe endearing
~emphasizes your ability to: problem solve, or show compassion, or overcome adversity, or bring people together, or demonstrate leadership, etc
Admissions counselors read so many essays each year with many of the same themes...people talking about their biggest academic or athletic achievement, a difficult situation they overcame, etc. These can make great essays but even a simple story about stepping outside of your comfort zone or having a unique experience or talent can catch the eye of the reader if it's well-written and different enough. Being authentic also makes you more relatable. It just takes one admissions officer to feel like they connect with you to make the difference between the acceptance and rejection pile. Good luck and happy writing!