A very wise man once said "Language has three important uses--it expresses thought, conceals thought, and takes the place of thought."
That is very interesting, but what does it have to do with your essay or with why you want to attend UCF?
My cousin has attended the Speech program at the University and benefited from the experience.
How? In what ways? Elaborate on this.
I did attend one of my cousin's speech sessions and found it to be fascinating.
Why? What was fascinating about it? Elaborate on this too.
What truly matters is giving back to children because they hold the key to the future.
Ow. I stubbed my brain on that cliche you left lying about. Put it away, would you.
Three unique qualities that I possess are: I exhibit quiet strength and determination, my love of writing, and my desire to help others.
Revise for parallel structure.
Hmmm . . . the rest of this essay list your interests, rather than your qualities, until you get to this part:
Another unique characteristic is my desire to help others.
Unfortunately, this is not unique at all. Every single person who is applying either has the same desire or knows enough to say s/he does. Try to think of something a bit more original. I wish I could give more specific advice, or suggest something you could try, but having never met you, I haven't the slightest idea what qualities, unique or otherwise, you possess, so you will have to come up with the base ideas on your own.