A few decades ago, when I played in a band, I got some good advice.
How you act in a small group setting, and how you act on stage are two different things. Your movements and expressions on stage must be exaggerated—almost to the point of outlandishness—for them to have any impact on the audience.
If you act and talk on stage the way you do with a small group, you will come across as not only wooden, but a statue. Cold, untouchable, and unlikeable.
Well.....obviously Donald Trump understands this point quite well.