I had a couple that were snappy when I got them, but they tend to mellow out. Most of mine have stopped even trying, but I have 2 that still hiss at me every time. I've owned BPs for a year now (seems like longer) and I'm currently up to 10 BPs and 2 boas. I've had a total of 4 or 5 connecting bites and few misses in that time. It of course varies snake to snake though because I also have 2 snakes that are the sweetest things on the planet.

If you really don't want to get bit I would wear gloves for a little while until you get to know them. They can tell when you are nervous that's when they tend to get snappy.