I guess I fall in the explorer category. I find a stretch of road I want to explore, print out maps and go. I pick an end point for convenience, but if I don't get there I'm not bothered because I'll end up going north/south by way of east/west kind of thing. Mostly because I'll find things I want to go see off the main route I laid out. Church ruins? Yes! Iron Age burial ground 5 miles that way? You betcha! 18th century manor/castle 10 miles over here? Oh boy!
I can easily see a 200 mile ride turning into 300 miles while never reaching the end X I crossed on my map.