personality

I am a junior at a target school and am applying for summer internships. I know I want to work in finance and trading appeals to me in many ways. However, I also have some reservations about whether my natural strengths and weaknesses are suited to trading. My question to the traders out there is: what kind of traits make the best traders? I'm talking the prop traders who bring home the big pay-checks.

I have no experience on Wall Street and had a few general questions...

Do most successful sell-side traders have more of an extroverted, intense type-A personality or does it differ greatly from person to person? How much do personalities vary between different products?

I'm very interested in entry level market maker positions but am not sure how my personality would align. I'm moderately introverted, methodical and patient, and probably more risk-averse than the average 21 year old - things which may be viewed as negatives for trader. But, I'm also competitive and hard working, having played sports throughout college.

Are there any specific products/desks that may suit my personality better than others?
Or, do I sound more suited for an area like equity research, which also interests me?

Any comments are appreciated.