I'm not saying AT is some sort of ingenious work of art, but it's self-consistent and follows a theme - fantasy world, with D&D/castle stuff plus candy.
What is the premise of Regular Show with gorillas, candy machines, ghosts and humans coexisting?
JG Quintel is an inexcusable waste of money.
Let's give randomness a scale:
1 (Comedic) Flapjack - Normal setting (pirate world), weird characters/events.
2 (Stylistic) AT - Weird setting (fantasy world), weird characters/events.
3 (Overplayed) That new train cartoon - Weird setting (train world), random characters/events.
4 (Only Ingredient) Regular Show - Random Setting, random characters/events.