Flat, colorful, two dimensional stop action animation appeals as a creative art in it's humor and range. Stop motion appeals most when it's simple, if a stop motion's storyline gets too complecated the voyeur can't feel and appreciate the animation. As a child I made my own stop motion features, just shorts with army men, monsters, and animals. Our stories were somewhat reminicant of the Mr.Bill series on SNL, focused on the visual appeal of a sort of different reality where everything moves in frame, creating fluidity isn't easy, but one can appreciate it once complete. A stop motion story is like a joke because it's easy to laugh at something so absurd and and unreal, although it can become violent it probably won't be contraversial-it's a type of media that, to me is both entertaining and widely accesable when it stays simple.
This is the reason that stop motion is usually directed at children; it is just captivating to a simple mind, even without elaborately drawn characters. Fantastic Mr. Fox was just recently left theatres and was generally a success, it was a fun, simple childrens flick that depends heavily on the animation styles of stop motion. We can only hope more