I've pretty much done them - all. But in my Honda Odyssey with the family (sadly the kids were watching a movie instead
)
There is so many camera's and speed traps now that the fun just isn't what it used to be. Even on these amazing roads, you're either stuck (slowed) with high traffic or really only get a sprint of velocity before you gotta slow down again because you see a cop pulling someone over. The drive itself with the views are amazing! but then again, so are the toll prices - geez.
Sometimes, I simply have more fun on back country roads and for me, everything here in Germany is an amazing view.
The Ring is less than an hours drive- but nobody ever wants to accompany me- damn scaredy cats.