It is fun
I am so lucky that I have a route to drive across the mountains that is virtually without any traffic. I can coast down a 10 mile long run at any speed I want, descending from 4500 feet down to about 2000 feet. WHEEEEEEEE!
My sister came over the other day on this route, and she thinks they met 7 cars in 80 miles.
Much of the traffic is milk trucks and chip haulers, these guys are great for mileage too. They don't want to speed, and the bad hills have a passing lane so you can get around them if they cramp your style too much.
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle
currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears