I have ridden the dragon. It's a really cool road, and the scenery is unmatched. But too much traffic and LEO presence. A lot of the 'best road ever' lists have the South Entrance of Mt. Palomar at or near the top, but there is a pretty unused road that is just as good about 10 miles away.
This section of the 666 and a couple of others I have to remind myself to breathe. It's like a super roller coaster type ride. The 666 is also home to my favorite campsite in the US. An 8 space NFS free campground.
"I'm in!"