I dont hold that against any snake. Most are nippy as babies and In my experience some of the more aggressive snakes are actually my most docile. I am speaking of my sumatran blood everyone I have spoke to about him are always like omg good luck with that one. I have found every snake is different and most are nippy as babies but with handling can all/most calm down. I was actually looking for a mack a while back but couldnt find any. I would not count any animal out without judging for yourself. I would recommend trying to find one locally so you could go and physically pick it up and tests its personality. My most aggressive snake is actually a RTB which are always classified as very docile. Once again its up to the individuual snake.