Code Geass was by far my most favorite anime of all time. It tends to lean away of the typical muscle-head of a main character in most action anime with a intellectual and dynamic character that does not exceed the capabilities of a normal human being (except of or course when he's using Geass and is in a nightmare frame).
At first i was skeptical about watching it seeing as though im not a big fan of giant mechs and robot battling, but the story was intense and inviting. This anime has a great balance of action, realism, story, dynamic characters, and fan service (hell yeah!), I highly recommend it for anyone looking for an in depth anime.
To sum up, the story of Code Geass is amazing, it is a must-see anime. I can guarantee you all will love it.
Please note: this is a review, not a summary.