No thoughts head empty just Kavik
I'm gonna say it. I don't like when people go "Kyoshi was controlling Aang here" when Aang does anything remotely powerful in the avatar state. In the Kyoshi novels it's pretty much established the avatar state doesn't work that way (she described it as being conscious but having thousands of voices influence her actions, when you control the avatar state you can choose not to listen, it's not One past avatar that takes over) and it also undermines Aang's power and fighting spirit. Just because Aang is a pacifist doesn't mean he can't give someone a good beating, and we've always seen Aang find clever and witty ways to fight. You hear him making funny quips (kinda like spiderman) during fights because he's a child.
So no, when Aang grabbed Ozai's stupid goatie when he entered the avatar state, that wasn't Kyoshi or Yangchen controlling his actions. That was him, because it's established that Aang was in a controlled avatar state during that final fight. Ozai just told him his people deserved to die mere minutes prior, you would have pulled his beard and slapped the fire out of his hands too. Also, he's twelve, he probably thought it was hilarious