One of the amazing things about Beartooth is the 70 MPH speed limit once you cross into Montana...in spite of the hairpins and serious consequences of misjudgment.
I did 36 just last month, and it is a fantastic road, but I'd say the PCH is more technically challenging between Garberville and Ft. Bragg. The Blue Ridge PKWY is kind of a puzzle to me. It has a 30 mph speed limit, loads of law enforcement, and heavy tourist traffic. The pavement and turn radius on the corners is second to none once you get past the detractions.
The honorable mention of Hwy 50 in Nv is interesting. Very much unlike the other roads in the bunch, and no shoe tree anymore. :blink: