I don't have one in particular, but I LOVE the old wavy back roads. I'm not talkin' about pothole ridden roads, just roads with character. If it has curves and hills, that's even better. Part of it is because those roads are more interesting to drive on, but I also have a lot of memories of riding around with the old man; hunting, fishing, exploring, etc... That would include county/seasonal roads.
It actually saddens me when they come through, repave and modernize such roads. I understand it, but it saddens me. What felt like a old rustic road with a story at 55mph now becomes a smooth boring nothing that makes 55mph feel like 35.
M22 is great. Certainly a favorite. I haven't been on M119, but I'd like to some day.