Finish Geass? Yes R1 and R2 last year. Well, I dunno what to say about GEASS, but trust me that show is super wicked crazy awesome, yes that is literally not figure of speech, haha
. It's on a very different level compare to other anime. Completely unpredictable till the end.
About Darker Than Black, yes it's good, just watch it and continue with 2nd season. The 2nd season storyline setting primarily takes place in Vladivostok, Russia. This series is dark, very mysterious, mature and violence. Definitely not pokemon type anime haha, means not for kids.