I have been riding one that belongs to a friend. He is super nice. I'm one that disliked them until I found a good one, now I will go to bat for them any day of the week. If a horse doesn't have some beduino, I don't want it.
Mine is spooky and gets frazzled easily if you try to push him. He is real honest and tries to please, but let's his emotions get the best of him. I think he's mentally a late bloomer. He is the absolute prettiest horse I have ever owned. I don't think I would eagerly buy another one though, only because he's not going to make the futurities and I have too many to keep long term horses.
My mare is as sweet as she can be and produces some outstanding horses.
The ones I've managed and handled have been super easy to get along with and athletes. I'm talking daughters/sons. When you start adding other genetics in, I could write a book about which sons I like/don't like.