The show is Norwegian (made in Norway by a Norwegian production company), and the country is an important element of the show. But it's the characters I watch it for: It's fascinating, how much I sympathize with the hapless losers, the vicious cheats, the selfish bastards who occasionally do something brilliantly good and it still doesn't make them good guys.
For me, if I can't tell for sure who's the hero, who's the antihero, and who's the villain, those are characters with the right amount of depth and conflict. But then, I also really like Joe Abercrombie's books.