First! If you were a fan of Death Note then you're already a prime candidate to liking this series.
The First Opening of the Series is Colors By FLOW and just by watching the opening i fell in love with it. A catchy song and awesome animation that really compliment each other!!
Reason why i love this anime is the Character development of the Protagonist Lelouch. He wants to change the empire for a better living for him and his sister with the power of Geass he attains from forming a contract with a Green haired Babe called C.C (C2). He is the leader of a Japanese rebellious group, he hides his face and goes by the name Zero. There's also great character development of supporting characters like his long friend Suzaku and His Classmates. Lelouch balances his between being a rebellious leader and a part of his schools student council trying to avoid getting any of his friends involved with his dark secret.
Throughout the entire series i was always on the edge of my seat. I even marathoned through the series because i just had to know what was going to happen in the next episode. Not like it matter though because there'd be some crazy plot twist that you didn't see coming!! Just when you thought you saw it all the Anime throws you a curve ball and leaves you in awe!!
Also the tactical and strategic thinking process that Lelouch does is outstanding and the Anime does very well explaining to the viewer as to how some things happened.
There is also some entertaining Mech battles in it aswell!!
and also there's a great deal of Fan Service !!
