"Judge people by their character, not by how they look," my mother once told me. I follow that to this day. This saying reflects the latin word Mores, which refers to character, custom or tradition. I wouldn't want people to judge me on appearance because I'm so much more then that. I want people to see my character; to see how responsible, hardworking and determined I am. Everyday I try to improve my personality and become a better person.
I think this part:
My character is reflected by the type of people I talk to, the extracurricular activities I do and where I go. I don't associate myself with negative people or slackers.
is good but you should word it differently, because at a glance it looks like your say that the people you hang out with affect your character. you should never say that because colleges want you to be your own person. Many college admissions officials read through your essay quickly, so you have to make every line sound positive (when possible)
I think the last paragraph is a little out of no where. I'm guessing the transition from the third paragraph to the 4th need work. If you can ask your english teacher to help out.
They are very useful tools when it comes to correcting grammar or transitions b/w paragraphs.
Good luck!