The Kats I have are not flighty at all. But then, I did work with them as lambs and halter trained them.
Also have a huge Kat/Dorper/stCroix wether.... he is also very laid back.
Anway, handling them early on and halter training, makes it a lot easier for me to work with them.
You can look at different breeders, what ever sheep are curious and come up or near to you... are the ones you want to bring home. They will be the easiest to tame down.