The Simpsons (when I used to watch it) for the chalk board and the couch gag.
A. That song is a jam. B. It adds value to rewatches; you notice the subtle changes they make to the intro animation (even sometimes in the middle of a season) that reflect plot changes throughout the series.
Breaking Bad because it’s awesome and 5 seconds long.
Ooohhhh WEEEEE OOOOHHHHHH
Vikings it just fits the show perfectly