By nature I am a leader
When you make this claim, at the moment you make it, you are not having a good effect. It does not make the reader simply accept the idea that you are a leader. You should skip the part where you make the claim and instead write a sentence about something you did to demonstrate that you are a leader. Let the reader come to the conclusion without being told.
It is the same right here: I have always been a passionate individual.---This sentence does not make the reader think you are passionate. It makes the reader think you are someone who claims to be passionate based on your own standard.
I became involved in campus organizations and extra-curricular activities to sharpen my skills and help me become a well-rounded student. ---- This sounds unrealistic. It would be better to actually say what they were and your real reasons for choosing them.
I would like it if this great sentence was the first sentence of the essay:
Always enamored by corporations, marketing and business, I decided that I would love to get involved in management when I graduated from college.----If the essay began with this very meaningful sentence, I would really be interested as soon as I started to read!
:-)