Indiana: It never changes. The northwestern part is all the same. Cornfields everywhere, super flat.
Illinois: Chicago traffic is miserable, the landscape is boring, and the storm we drove through in the north later turned into the tornadoes that killed all those people in Missouri.
Wisconsin: Nice trees and hills. Good hunting territory one would suppose. Beer, cheese and ice cream are all cheap, so that's cool.
Minnesota: Kind of bland, but driving through Twin Cities was a breeze compared to Chicago.
North Dakota: Much cooler than I thought it would be. The badlands-type landscape out west was especially wild. Everything is cheap, and the oil towns were surreal.
Montana: Everything was either under construction or water. Weather sucked. Some of the vistas were really striking though - all wide open, still having that American Frontier sort of feel.