Not a favourite as such, I only discovered it on Sunday but what a cracking little road.
First two-thirds from Newbury was uppy-downy twisty-turny mostly under trees so beware, the road surface holds the damp. But then it opens out and you're on a ridge overlooking the vale of West Oxon - stunning view. I'll be there again, worth the 120 miles (if I can find it again )
)