I just realized that no one has recommended Black Lagoon.
Seriously? It has gun-running nuns, psycho paramilitary maids, a flame-scarred female Russian mob boss, an island paradise populated almost entirely by violent criminals and a smuggling operation that uses a WW2 patrol torpedo boat as transport. How do you not say "Everybody needs to see this series at least once!"?
Agreed! I don't know why I forgot it. And the sequel series Roberta's Blood Trail