I can only speak for my experiences with my three females.

I have not found any of them to be nippy. They each have their own personality, but none are or were what I would consider nippy. Depends on the personality of the snake, I think.

My boa's feeding responses are pretty fantastic and so I would never want to move them from one environment to another. I have them housed in RBI reptile cages right now and I see no reason to move them to another space for feeding, and every reason NOT to move them for feeding. They stay in hunt mode for quite the while after feeding...

Lastly, I wouldn't necessarily call their feeding response 'aggressive'... maybe just...mmm... enthusiastic