I kind of like Nebraska's quarter. The tall, jagged austerity of Chimney Rock provides a good balance to the smooth roundness of the sun (which, of course, is sending forth those nice life-giving rays). It actually makes for an effective landscape on such a small canvas.
And then, they had to put that wagon on there. In this picture, you can at least tell what it is. On a quarter, it's a blob. And it kept this rating from being one notch higher than "Good".