A friend has a SI Gelding he does have sensitive/ bit nervous type personality
. He is a nice looking horse & good mover.
As far as Impressive breds,lets not be brushing them as all the same
no they aren't the all nervous flighty types, I have worked with many. My experience is they are often a horse that thinks too much, almost too smart for own good & you need to keep their mind engaged ,give them a job to do. A personality that isn't for everyone you either understand them & like, or you label them as difficult