Since I started driving trucks, I've seen a fair number of the states. Haven't bothered to take an exact count but I'm likely pushing 40 by now.
Favourites: pretty much anything west of Chicago (fuck that city), with the exception of Idaho and Utah and those big hills but only because my gutless truck has less in the balls department than Jeros.
Montana and the Dakotas, maybe Minnesota are Top 3 because Jesus Murphy, yous are just Canadians with cheap beer and grits for breakfast.
WV is nice too I guess.
Least favourite is likely Illinois...and Indiana...but only around Ft Wayne/Indy. And I-75 between Detroit and Toldeo will be responsible for a ruptured disc or two, 1 day.