Hey there Tekla... The highway between Durango and Ouray is on my list... I love the drive, and the hot springs in Ouray (there are also some awesome ones just out of Durango). The million dollar highway is amazing for sure, always hiking those mountains by the way. Actually any drive between Rico and Lake City from Durango to Ouray is great!
I am definitely a southwest girl so any drive there is great; I have a lot of roads in my mind but I don't really want to give away my area...
A great, though often treacherous drive, is between Manali, Himachal Pradesh and Leh, Kashmir in India... One of the most beautiful drives in the world by far I have experience, yet one of the closest to making you feel like you are goin' to die.
Also drive up the Eastern face of the Sierras in between Johannesburg and Bridgeport, AMAZING fyi!