...Gravity Falls on Disney XD (Felicity knew this way before I did, so hats off to her.) The show's writers do a great job of balancing emotion, action, comedy and suspense, making it something that people of all ages can get into - despite the fact that it's ostensibly a kids' cartoon.
in a recent interview, "first and foremost, it's a show about characters." That's a lesson that we, as writers, should always keep in mind - that no matter how many powerful spells or big explosions or scary monsters we have in our stories, the human element is really what resonates with our readers or viewers. We may not be able to raise the dead or fight shapeshifters, but Dipper's crush on Wendy, Soos' non-relationship with his father, Mabel's rivalry with Pacifica...now those are things that we all can relate to at some level.
Once you have that human element as the backbone for your story, then you can layer on all of the other cool stuff, which Gravity Falls also does an excellent job of doing. For example, the show's theme song is catchy and unique, and a number of episodes use variations of the theme to great effect whenever a certain mood is called for. And the inclusion of ciphers in the credits is a fun idea that engages the more sleuth-y members of the viewership.