Gravity Falls I think makes far more sense than Adventure Time. Adventure Time just... What...? I see why it's popular, it's got good animation but it's so weird! Almost as weird as me! But that's not a bad thing, I mean it makes it different. Although plenty of seemingly, and suspiciously similar shows have ensued now... How strange... But I just don't tend to watch it. It's entertaining, but when I'm looking for something with a story that actually makes sense, I'll always go with an all-time favourite of mine, Gravity a Falls. I know both shows incorporate mystery into them, but trying to figure out what all the hidden messages in Gravity Falls means, with an actual hope that that possibly will happen is always fun. So yeah... I prefer Gravity Falls, both story wise, character wise, and looks wise. Not saying Aventure Time is bad, of course...