I just finished watching Charlotte, so if you liked Charlotte chances are you'll really enjoy Darker Than Black. A little warning though. It's a lot more serious, dark, and violent. Not to mention a slower story, spanning over 3 seasons. (btw if you do get into it, watch it s.1 then 3, then 2. story just works out better that way.) it's complicated, but that's what I really enjoyed about. a more mature serious anime. if I had to say what it's like, I would say Deathnote meets Charlotte. yeah it's like that.