US-24 westbound out of Fort Wayne, Indiana. Good highway with rolling hills and great scenery. Going to Kokomo is always a pleasant trip.
I-80 through upstate Pennsylvania. Mountains, curves, tunnels, it has it all. Spectacular in the fall.
On the other hand, some of the bad ones;
I-75 through Ohio. Flat and boring.
I-94 eastbound from the Wisconsin line through Chicago. A parking lot. Seems to never move.
More to follow as the trips continue.