The only ones that I don't like are the country roads where they use pea gravel. Sometimes I can't tell the difference between the old hard pea gravel and the fresh stuff. I try to stay in the tracks of other vehicles that have already driven it.
beware of the belt damage !!!! i hardly ever ride on gravel but i find myself replacing a belt way to soon !!! 10k ouch!!! be careful guys your taking a big chance
I've been on a few but avoid them when possible. Sucks every summer when they oil and chip all the country roads around here, have to stick to the main road until they clear off some.