A college essay is the time to explain more about you and your life. This can be done by writing about a favorite activity, telling a story that you experience, or make up a story to show your even more creative side. Whatever you decide to write about make sure you start by drawing the reader in right away. Then it’s up to you to continue building upon this momentum like your building a skyscraper one floor at a time. Then remember to express an overall positive message on your essay. This is a good way to leave the reader with having a positive light on you personally .
You are a good student and would be competitive for those schools but I do not give opinions on someone’s chances at a particular college. Selective colleges like those you list are all looking first at the grades you have and the classes you took to get those grades. They also look at your test scores but good grades and test scores alone will not get you into a selective college. They also consider your extracurricular activities, your personal background, volunteer activities, your essays and other factors. Selective colleges are looking not only for strong students but also interesting students that will make for an interesting class. This means different things for different colleges.