Story: The story centers around Rock and his gradual acceptance into a group of "delivery boys", a group of mercenaries/pirates called the Lagoon Company. The story delves into the underbelly of gangs, mafia, and Russian ex-military. With a rich cast of characters and plenty of action, the story is quick-paced and thrilling.
Animation: The animation is clean-cut, sharp, and everything one would expect from an anime filled with flying bullets and short-tempered gunslingers. What it lacks in the soft contures of a shoujo anime, it makes up for with dynamic angles and sharp detail.
Sound: A good mix of background music to set the pace for both action and lulling intermediate areas. The OP "Red Fraction" is one of my favorites, and is definitely fitting to the anime.
Characters: From shirt-and-tie Rock to the nuns of the Rip-Off Church to the ex-military Balalaika, the characters of Roanapur are a rough-and-tumble bunch. Though violent and deadly, the characters of Black Lagoon are sure to keep your attention.