The Last Airbender/Naruto/Guru Laggon/Pokemon have like 500 loving episodes but they are usually the same stuff; blood, gore, love & more blood.
I can't recall any episode of those
children's cartoons being filled with anything resembling love, blood, and gore.
Family Guy (which you said you like) has magnitudes more of those things than the other combined.
It's also worth noting that Avatar was also produced in the US for US audiences.
Ya I was going to rag on him for calling Samurai Jack and Code Lyoko Japanese, but you already did.