I live in S.C. and have driven west to Colorado several times.Going to pick up car at end of month and would like to not take freeway home. Myrtle Beach SC to Boise ID. I have never been east of Tennessee and really not explored any roads twisty from Colorado east. A cross country drive, 2300 to 3000 miles in under 5 days in a new GT500 CFTP and no freeway. What roads back east are fun, fast, and curvy?
Prettiest drive is thru the Blue Ridge parkway, N.C from Asheville to Tenn up to Kentucky. Beautiful country and may I suggest stop for a Bourbon tour while in Kentucky.
Driven both routes from Mizzou,Kansas, Colo and southern route Texas, Okla,N.M and neither were much to look at imo. It was kinda cool watching the terrain in Kansas change across the State.
Someone mentioned Dakotas(Badlands), etc.. which may be a cool route and if you go through Kentucky, Southern Illinois may be the best way to go.
Have fun and take some good pics along the way.