I never look for great Musicians, I'm a band guy so I look for good people, good entertainers, likeable people.Many talented Musicians are introverted and not really good candidates for a band.
Take a look at this short clip. Jerry and Chet are both introverts, it's how they got so good. They make what is very difficult seem effortless and easy. While introverted they also became entertainers and likeable.
I'm not sure what my point is.
Blue