Terrain builds would be a lot more fun with actual ramped roads.
There should probably be different grades of slopes too. 32x32x4, 32x32x8, and 32x32x16. I think a 32x32x16 is already about a 45 degree angle, so anything higher than that would be ridiculous.
Also, slightly curved ramps would be really awesome for bridges or starting/ending a steep slope.