Originally Posted by wolfing 
oh, but maybe I'll take a 7 day detour to the southwest to see what color of flowers there are.
I think this has also something to do with the urgency, the "urgency factor" of a quest.
If the urgency isn't too high, okay, then it would be reasonable to make a detour.
Maybe then someone even finds something better, then ? (Let's say a quest requires a special item to heal a person. It's not very urgend, because it is a non-lethal, but nasty illness, like … let's say a simple flu. On the way, however, fetching this herb, IF you do a detour, you might find deeply hidden deep within the wilderness an even better herb … One the herbalists had nearly forgotten about … And one that is only noticeable to you if you have a high botany skill … Or is only mentioned by the town's herbalists if you ask deep enough … )