Before あなた go flaming on me,understand that this is just MY opinion.

1. Animation

Adventure Time has some really crative designs and bright Colors（色） which is probably a big plus for the younger viewers.

But,being 18 myself,i don't really think much of it. And even if i was still a kid-i always LOVED 動物 walking and 芝居 like humans. The カートゥーン that had that were usually my favories.

Regular 表示する wins this round.

2. Original Songs

While Regular 表示する has one really awesome original song (Party Tonight) and 2 others,which are okay. Adventure Time has alot of original songs,and they are all pretty...