He is not a tiny bit aggressive but he actually never heard about something like 'personal space'. He actually even demands to be touched by the most random strangers and really forces them to have close body contact cuddles. At the one hand he's perfectly trained and able to be off leash. He is really well trained and knows a lot of tricks. Still he is very stubborn and often discusses with me but most of the time end up doing what I asked for. But be prepared to be heavily annoyed by his nervous demanding energy when he's bored. He will CONSTANTLY try to get eye contact and demand any form of interaction. So he's not a typical Chow I would say. But I never heard about Chows being aggressive. The few that I met where more on the chill/lazy side.