It's hard to find Class 4-6 roads in New England. There's also scenic spots or food. I plan my routes w/Delorme, internet maps & www.hillmap.com
(when slope is a factor). For now, I need all the turns to get me to several destinations along the route.
If an impassible natural feature or road closure occurs, then I wing it (zoom out) to get back on route, where I hope to find more good stuff.
I guess I'm not a Sunday driver & haven't thought that the time planning a route could be used for other stuff, like actually riding for riding's sake. Maybe it's time to get a sidecar & dog? Interesting question about personal preference - makes me think I should try.
"Four wheels move the body,
Two wheels move the soul." http://ridingacross.com/
Three move you & the dog!