What I consider a “fun” show is mainly determined by the complexity and personality of the characters within the show and not the plot itself. That’s why Eden of the East or HxH is listed; because of the freedom and actions of characters within the show. I also determine a show to be fun by how free or playful certain scenes are. That’s why From up on poppy hill and Akudama drive was listed; because scenes were very flowy and playful and vibrant.