The eyes, the eyes. And I love his slightly wonky teeth too. Please don't let him get them fixed.
Honestly, I am sick and tired of all those "perfect" teeth I see in US. As long as the teeth are healthy, I don't know why teenagers have to go thru the painful and awkward state of wearing braces. I am soooo happy that my family dentist has the same believe as me. He never nags me to fit my son with braces, like my nephew's dentist