I hear this all the time. By temperment, I am assuming you are thinking agressive biters that never become tame. I have 10 types of American Rat Snakes, and none of mine have temperments. Yes, some can be biters, but I think that most CB American Rat Snakes are not.
"cornsnakes are the most docile species i know of and they are a rat snake" Yes, Corn Snakes are rat snakes and most are docile. I have a docile one myself, but I also have a young male Gray that makes the Corn Snake seem wild. There are exceptions to every rule.
Are you thinking of getting a Rat Snake?
