I have never been on horseback in my entire life. How is the experience exactly and how much control do you have?
It would be silly if you have the same amount of control like in NW where you can twitch, etc.
Well, as someone who has rode a horse before, you have to remember that they're actually beings and not a car. They think for themselves, they act upon what they see. Horses have a sense of danger an direction which you have to account for when riding them, you're not telling the horse where to go, merely suggesting it with the occasional twist of the reigns.
...I just realized how hippy like that paragraph I wrote is, someone please shoot me.