I just finished my third complete rewatch of Geass. I shared 11 hours of my life with with characters of whom I think like they are real people, despite each of them is suffering from more diverse psychological problems than most people would even start to consider realistic.
I'll not waste words to describe menial negligibilities like animation and sound in this text - to me that would appear disrespectful of the greater quality this anime does posses.
However, writing a useful story or character review for Geass is incredibly hard, not just because it can (and does) mean totally different things to different people, but also because the series in itself isn't quite a consistent experience. Instead, there are episodes which, despite being skillfully executed, are not much more than your average mecha/action/comedy fare - for example around the time CC arrives. Yet there are also those that "weave a story", to say it in the anime's own words. That story is either amazingly complex, filled with religious references and political skirmishes, or beautifully simple, depending on your point of view. And then there's the third type of experience to be had when watching Geass: The deeply introspective and entirely psychological trip that is most apparent in the last two episodes, but also shows itself earlier on, albeit not on the same scale. That piece of the puzzle is also probably the reason for the continued discussion, praise and damnation of this series by otakus and casual watchers alike.