My two BIs are very laid back, especially considering their histories.
Elenore was found on a porch of a woman with a rat problem by an exterminator. He gave her to his adult daughter who had twin toddlers. The snake was placed in a tub full of Aspen with a folding lid, no heat, no water.
The toddlers would pull the Boa out all of the time and drag her around the house. When their Pit Bull started to try and get it out of the tub is when I rescued her.
Elenore is extremely gentle and has never bitten.
Punch, is a 10 yo BI that had a Pit Bull problem as well (I'm not picking on Pit Bulls here). The dog destroyed his cage so the owner let the snake free range and live in the rafter beams of his house to keep away from the dog.
I have cut Punch's food intake in half and doubled the time between feedings from the original owner and Punch has never been aggressive even when it's time to eat.
My daughter was deathly afraid of snakes. Here she is with Punch and she had only held Elenore once before.
I can't comment on Hoggies, but I would not hesitate to own one of those either.