
I think the problem with books, and any other one way communication like a website, is that it also doesn't take into account the experiences and attitudes of the reader,as well as the author's as others have said.
Characteristics such as trainability, intelligence, independence, prey drive, sociability (with dogs, other animals and/or humans) are very important to me but so variable within breeds and highly subjective.
I had a Elkhound for 9 years, not reknowned for recall, I could reliably recall her from sheep, horses, etc she wouldn't get any obedience awards, but, as my friend said to me - after I'd told my Heidi to 'leave' her dog that Heidi had 'put in its place' -she listens to you, doesn't she'. It did take some time to get to that stage though. So, it depends on what you think these attributes are and what you want from a dog. Someone wanting an obedience champion would think Heidi too independent, i, wanting a non-aggressive, family friendly, protective looking, uncomplicated and safe walking companion found her obedient enough. You'll not find much about the breed that says that.
What is frightening to me, is that people showing their dogs will hide their dog's temperament by using Pet Calmers of some sort so, even if I went to shows to meet the dogs and owners - how would I know what is true and what is medicated or falsely presented in any way?