The most effective presentations are offered to the Audience participants in the “middle,” not at the extremes. Let me elaborate:

When I worked with Domino Pizza's distribution corporation in 1992 on a book titled The Domino Effect, I learned from their division president that among any target or audience group, roughly 6% to 8% will dislike you no matter what you do because they associate you with something or someone negative! Hence, their evaluations are essentially invalid.

A similar percentage, roughly 6% to 8%, will approve of you almost regardless of what you do
because they like the way you look or your personality! Their feedback is invalid too.

Your real task becomes reaching the middle 84% to 88% of the audience who arrive relatively-free of inclinations towards the presenter one way or the other.