If you liked
Black Lagoon
|
...then you might like
Canaan
|
CANAAN and Black Lagoon have very much the same feel to it. Both the main characters are bad-ass women with guns with a lot of good action, both series are mainly located in a urban city in China and are well illustrated. They both have a sense of dark organizations doing things behind the scene, though Black Lagoon has it less and doesn't have any fiction things (like non existing viruses and such) CANAAN and Black Lagoon are both very awesome series to watch if you like action and gunfights.
If you liked
Death Note
|
...then you might like
Darker than Black: Kuro no Keiyakusha
|
Both are about how the people who have powers use them in the right and clever way to outdo their opponent, and not that if one person has a slightly better power that he wins by default or something like that. They both have that detective vs. plotter, and also they both have that mid-episode cliffhanger where you really have no idea how they would solve or handle the solution, but then they come with the most awesome things that you really never would have thought of. PS: they're both very good animes by default, you should watch them both anyway.