It's a fact people generally like to do business with people they like and, as long as confidence doesn't slip into anything near arrogance, then the best people to be with are those that are fun and lively.
For anyone that's encountered one, anxiety attacks are terrifying. You genuinely believe you'll never be able to breathe again, that your mind has convinced your body that your time has come, that it's just not capable of continuing.
Fear of public speaking is the scourge of the boardroom and wedding party alike. The dread and anxiety that comes with thinking about a forthcoming presentation can force many to find ingenious ways to escape, or stock up on Xanax medication. It's called Glossophobia, who knew?
Stage fright is considered taboo. It's not only considered taboo, but also shameful. I have known many a highly successful, seasoned professional, who has confided in me, their deep, deep shame at having nerves that cause them such distress.