Give me an Lời khuyên

Ao no Exorcist is about demons and exorcists and stuff, Code Geass is thêm mecha and the main character is a little like Light of Deathnote. I guess it depends on your preference.

For me, Ao no Exorcist is better though, but its just 25 episodes. Code Geass has two seasons.

I have not seen Ao no Exorcist but Code Geass was the first anime I saw and it was great.

Thought tht they r both lame >,>

i'm not sure about those two animes but i think bạn should just go with what bạn would like. just go with bạn feel is the right choice.

Why can't bạn watch both?
watch one first then the tiếp theo one after...

Well, Code Geass is my personal preference of the two, but I don't see why bạn can't watch both at the same time, hoặc even one and then the other...>.>

Ao no Exorcist

I don't like C.G