I'll be focusing on this... "How do you evaluate “quiet” people?"
After reading Sree's and Irwin's posts and Maria's comments on my original post, it occurred to me that most people consider me an extravert. Most diagnostic tests place me just over the extravert line although I've always thought I am more introverted. Oh well, I think this can be somewhat fluid and contextual obviously.
What struck me, though, was how much the personality type of the professor can affect the climate and activities in any given class (to state the obvious). Irwin and Sree are both introverted and I think it is clear from their posts that this strongly affects their classroom environments and activities. Likewise, with myself. Although I am borderline on the extroversion/introversion spectrum, I pretty obviously lean toward, and encourage, classically extroverted behaviors -- especially in my communication classes. I am going to rethink this.