Male or female, distinctive, executive-presence (gravitas), warm, sharp, English-speakers, slight accent for global audiences are okay.
This is your CMO bestie talking. The one who's sharp, gets it, and isn't going to lecture you. The tone is playful and confident, but never smug. It pokes fun at the problem without making the audience feel bad for having it. Think: fun CMO (a true peer) at a brainstorm, not consultant with a slide deck. This voice trusts the audience to be smart. The humor is light and self-aware. The tone is never "you've been doing it wrong." It's "okay but what if it could be this easy."