Dont like and dont use them. Bethesda just cant get horses right in their TES games:D
I use horses for realistic fast travel. But I have to agree. Bethesda Game Studios always have some moronic way to screw them up.
If I want to travel I want to see the scenery, not get stuck watching the floor - the 3rd person camera could be OK if not pointing directly to the horse's ass!
There's also something strange with the horse walk animations, not natural.
This.
The only thing left to make them perfect:
- AI set not to attack enemies on sight (at least, not even caring for "advanced" stay follow command!

)
- Simple storage, like the companions have.
Too difficult??