A friend of mine gave me a Lesser that had plenty attitude because they were afraid of him but it was probably because he wasn't handled ever. He still tries to see if he can eat my forearm from time to time but its a feeding response and he's calmed way down. His feeding response is ridiculous whether live or thawed.
I'm fostering a fire killer bee from the same friend cuz she became super snappy... Like rapid firing. She's so much calmer now. I believe its due to the environment. Multiple dogs and the smell of the dogs plus constant traffic on location. I have them both in my rack and on a consistent feeding schedule in a separate tub, she's calmed down drastically... Hasn't snapped at me once!