I have a dumerils and a boa constrictor, both males and they are both very well tempered. They do move quicker and grip harder than my other snakes so handling is more interactive. I've never been bit by either, they've never even tried. The dumerils was a baby, the redtail was three when I got him. They do love food and strike at movement instead of waiting for food to go in the cage and will come out flying if you aren't careful but that's pretty easy to control. I think Burms are probably a good starter giant but I wouldn't want to have to deal with feeding or cleaning up after a snake I can't safely handle alone. Plus the space needed would really limit anything else and you really have to think long term, can you handle that snake in 10, 20, 30 years? What if you die/get injured/get sick/want a vacation? What's the housing situation? What if you move? Legality of the snake comes into play too, so many bans these days. Doesn't sound like you are planning to jump in but definitely things to consider.