I am no expert but will share my observations and what I have been told. Having 31 snakes including retics, anacondas, and afrocks, and bloods I have some experience. Perhaps some of the real blood experts here can add to this or correct me. Bloods are shy snakes and like to hide most of the time and usually slow moving. For years, like retics, thsy got a bad rap mainly from wild caught, ill tempered ones that were just scared from being captured. Captive bred and born shakes can be a lot calmer.
I have raised two Borneo short tailed pythons and one male Malaysian red blod from babys and have never been bitten by any of them. I have been told that the Borneo STP are more docile than the reds and that my red is the exception to the norm. He is like a big ball python-you can just reach in and pick him up and he likes to be held. He is 4 foot long and my son sits and watches TV with him-LOL. All of the bloods are firmly terrestial snakes and where problems arise are when they are held and panic when not fully supported, When holding a blood you should support as much of the body with your hands/arms as possible. Each snake is an individual and a lot of how the snake's temperment is formed by the owner. Bloods are wonderful snakes and can be very trustworthy. They are a bib constrictor that does not get big in length. If you want one, read all you can on their care and husbandry and get a nice CBB baby from a reputible breeder. That way you can grow with the snake. Babys are known to be nippy but with gentle handling and trust formed with both you and the snake, all should be well. Take care-Bill.