1) He is sincere. If he likes you, you will know it. If he doesn't, that will also be clear. If he loves you, it is unconditional.
2) He has no ego. He couldn't care less how his hair looks or if his shirt makes him look too skinny. Just as long as it doesn't impede his fun.
3) He finds joy in the simplest things: A paddle and ball, a balloon, those wish blossoms you blow and scatter in the wind on a spring day and a big open field where he can just run.
4) He can not manipulate.
5) When he feels the urge, he dances. When he is inspired, he sings. No matter who is watching and judging.
6) He can not grasp the concept of gossip.
7) He is loyal. If he chooses you, you have a friend forever. Just ask Oscar, Cookie Monster and the Count.