Be Yourself. Forced humour sounds like you're trying too hard.
Do's and Don'ts
DON'T try to be funny.
DO be natural and professional.
DO SCRIPT: Investment Manager: Some people say the glass is half full, some say the glass is half empty. Engineers say the glass is twice as big as necessary. [Laughs at own joke].
DON'T SCRIPT: Investment Manager: Our engineers like to make sure that they cover all bases which makes me feel confident about their work ethic.
Seriousness builds trust with your audiences.