I'm new to this forum so please bear with me if I am asking a question that's been posted and answered elsewhere. I've been looking at some breeders' websites, and the prices often vary depending on individual kittens. Many sites talk about how this or that kitten is pet quality. I feel silly to ask, but what makes a kitten "pet quality" over "breeder quality"? Is it simply a difference of having more desirable physical traits? Or is it also a personality trait?