A very weird mix of things I like - anti-heroes, weird humour, Gogol Bordello's music, DC characters. All of it mixed together with a interesting amalgamation of Eastern European stories, nations, and feeling; with a minor dash of politics and very generous dose of gory fight scenes. Quite a surprise.
I also liked that the show doesn't take itself too seriously, so some clichés are fairly acceptable and don't come in the way of the story. Surprisingly easy to root for characters I've seen only for a few episodes and enough plot to keep it interesting.