The Penguin is so good! Every character is a complicated person, with a history, and loyalties, and conflicting motives. They all do things that make sense from their own POV. It's just a really compelling gangland drama.
Technically it's a superhero show, but only in the same sense that Joker was a superhero movie; it's a based on characters from a superhero comic. Everyone is a normal human (well ... normally powered) and nothing remotely supernatural happens (so far).
@adam
> I've already seen the sopranos
Why? You must have already seen The Godfather when it came out. Or maybe you hadn't seen it, because you'd read the book instead?
After all, it's clearly very important to avoid more than one story told in the same setting, even if there are 2 or more that are very good. Which is the one sci-fi story you've allowed yourself?