Teenage, young adult, youthful, bright, friendly, approachable, warm, honest, sincere, caring, helpful. Fresh, millennial, upbeat, urban, energetic. Natural, real, student, guy on the street. Relaxed, easy going, matey. Comic, quirky, cheeky, playful. Educated, intelligent, sophisticated, discerning. Urgent, authoritative, informative, corporate, educational.