Code Geass 1-5
First impression... I didn't even know about this anime and that CLAMP was the character designer, and still has that slashable best friends, until my cousin and brother mentioned.
Ehh... I think the original idea was similar to Death Note, where one genius boy was given a tremendous power, and he used it to change the world. Cool. It's sort of a mix of Gundam and Death Note. But of course, it can't be described just like that. My brother said he enjoyed this more than Death Note.
One boy is a Britannian, but he helped Japan to destroy Britannian. The best friend is a Japanese, but wants to be a Britannian and changed it from the inside. Hm.
The first season has ended, abruptly, I heard, probably to think of better plot? I haven't even reached half of the series yet, but I'm looking forward for the second season. Anime with war theme and continuous story throughout is addictive, compared to other anime with great story but with slight gap in between. Highly recommended, I suppose.