Yeah, not every chameleon is the same, even if it's the same species.
For instance, of my 5 female adult panthers-- i can pick up and handle 4 of them. They let me check them for eggs with no problems-- just wait for me to put them back and feed them...
then I have female #5--- draws blood half the time i try and move her to her lay bin. I dont know what her deal is, but she will squirm and fuss until she can bite even just a little of me.
So, that being said, try and find out the temperament of the chameleon you are purchasing from the breeder. Some always are pissy, and some are always calm.