A selection of commercial clips. 

Vocal qualities: Authentic, conversational, believable, friendly, warm, quirky, fun, fresh, upbeat, professional, relatable, natural, compassionate, educational, inspirational, motivational, articulate, clear, corporate, real, smooth, soft, confident, bold, casual, excited, happy, cheerful, witty, matter-of-fact, authoritative, calming, comforting, approachable, charismatic, engaging, dynamic.