Howdy all, I'm ToyStoryFan123, better known as Toy (or Toy Story (or Fan)), I really like Gravity Falls. It's a good show in my opinion, and seems to be so in most others opinions.
Pretty much all the main characters are well developed and given back stories, so that adds to the realism. :P
However, I see Gravity Falls as a comedy first, and a secret-encoding show second.