I'm not really sure about this one, and my opinion may change, but I think he's a little bit more of an introvert. I get that he is very expressive, opens up easily and expresses his enthusiasm, but he also seems more than happy walking around with no friends and quantity of friends or acquaintances seems to mean nothing to him. He appears to express himself better through non-verbal communication (the catfish arc) and doesn't mind spending hours alone. He also attaches himself to the people close to him and tries to connect with them on a deeper level (Jake, Kitty, Marley). Still, this is debatable, considering how outwardly his energy is tuned.

totally.