I've heard people say from time to time that this type, or that morph "seems" to be more mellow than another one, but that is only because that PARTICULAR owner/breeder's certain line of that morph may be genetically predisposed to have a better temperament. However, there is something to be said about them gradually becoming much more manageable around one year of age or so.
Also, handling technique plays a very big part in just how comfortable the snake feels when it is being handled by you. Generally, I find that if you can keep them from frantically whipping from side to side while also musking, in an attempt to escape your firm grasp, you can keep them from biting too, this is when they are most apt to bite. Using very slow deliberate movement with your free-hand, and not letting it see your hand approaching from the front or side is key. Moving your free hand slowly only when the snake is moving also helps a great deal. When the snake is sitting there motionless, this is NOT the time for the big "MONSTER HAND" to come swooping down on it,....the snake will always perceive this as a threat and BOLT!,.....which in turn makes you frantically grab it off the floor, makes it frantically whip from side to side, musking and biting..etc...
So in short, if you can keep the first "bolting" response from ocurring, the other ugly chain of events won't likely happen either...
~Doug
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"Better to be silent and thought a fool, than to open mouth and remove any doubt!"