market maker

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.