The amount of heart and joy that they inject into every episode is really something. The characters for the most part are well-rounded and fleshed out, and the overall story arc blends in beautifully with the original films.
Johnny continues to be the beating heart of the series, with William Zabka stealing every scene he's in. Not just for the humor that his character brings, but also his dramatic scenes which carry a lot of the emotional weight in terms of the story.