If conformation and movement decide what a horse can do, temperament and rideability decide whether you will enjoy doing it. For an amateur buyer, these two qualities matter more than anything else, and almost no advert leads with them, because they do not photograph.
Temperament is the horse’s character: brave or spooky, hot or steady, generous or opinionated. Rideability is narrower and specifically about the ride: how willingly the horse accepts your aids, how it responds when you get something slightly wrong, whether it keeps trying. A horse can be a saint on the ground and hard work in the saddle, or the other way around, so watch both.
There is no single right temperament, only the right one for you. A very sensitive horse responds to the lightest aid, which a professional prizes and a nervous amateur finds exhausting. A steadier horse forgives your mistakes and needs clearer, stronger aids to get going. Neither is better. What matters is the match, which is why the honest self-assessment back in chapter two was the most important page you will write.
You can read most of a horse’s temperament before anyone rides, if you watch instead of chatting. How does it behave in the stable, being caught, tacked up, having its feet handled? How does it react to something new, a jacket on the fence or a dog trotting past? The interesting thing is not whether the horse reacts, because any horse might, but how quickly it settles again. A horse that notices something and then relaxes has a good brain. A horse that cannot come back down is telling you something you should listen to.
Under saddle, the most revealing moment is a deliberate small mistake. Sit a little heavy, give an aid slightly wrong, ask for a transition badly. The forgiving horse shrugs it off. The difficult one holds it against you. That single test tells an amateur more than any amount of beautiful trotting.
And ask the direct questions, even the ones that feel rude. Is it good to load, to clip, to shoe, to hack out alone? Has it ever reared or bolted? Is it on any calming supplements or medication? Sellers of good horses answer these plainly. Evasion is its own answer. Whatever you are told, get the important points written into the contract later, so that a spoken reassurance becomes something you can rely on.