Eh. Depends on the horse.
Annie has the smoothest gaits of any non-gaited horse I've ever seen. She absolutely glides across the ground. I learned three-time (
) flying changes on her and I had to have someone tell me what lead she's on because I can't feel the change. And her trot is beautiful....it covers ground and is so smooth.
On the other hand, Toni has a gelding I ride that has the most jarring, bumpy, uncomfortable gaits. Not as bad as Rebel, but still pretty **** bad. Just depends on the horse.