Penny usually follows trails and paths rather thean setting out across grassy areas or pushing her way through shrubbery. She will wait a a junction of the path to see which way I'm intending to go, and then head along that track. She seems to perceive paths and tracks as serious business - going places, in other words.
Grassy areas, on the other hand, are for play. (So are puddles, of course.)
I wonder how much of this trail-following behaviour is instinctual and how much is training. After all, when she is on lead, we are usually walking on a path.
And when she's out with groups of dogs and humans, we usually follow paths.
Trying to find out a bit about this behaviour, I came across an interesting site called Wolf Behavior 101 where you can send in dog behaviours and get some information about how they relate to wolf behaviours. I've put in a query and now I'll wait and see whether I get a reply.