I've been in the habit of thinking the fastest horses are always the best ones to ride, but as the elf was cruising thru the Jerall Mountains today on her Black horse, running into rocks and trees, I finally found an advantage that Paint horses have (besides cheaper price).
Paint horses aren't nearly as fast as black horses obviously, but their advantage is manuverability!
I'm whipping thru tight turns, zipping between rocks on the paint horse at full gallop, zinging right thru the Jerall Moutains after collecting Azura's Star. It's way more fun to ride a black horse if the road is straight and well-tended, but the paint horse is way better areas that are twisty and difficult to run thru.