Ive kept and cared for all of the snake species mentioned so far, and I can tell you from personal experience, I've been bitten by every single one. Like someone mentioned already, every snake has its own individual personality. If you're totally anti-getting-bit, I don't suggest gunning for any particular species, because your luck would have you getting the one "exception". Instead, go visit your local pet store or even a herp expo near you, and try handling several different snakes.
Ball pythons are probably your safest bet, but I have come across several babies that are quite snappy.
Sand boas are usually placid once out of their cage, but tend to be cage-aggressive, and can be nippy around feeding time as well.
Children's pythons and their cousins, the spotted pythons, are often quite fiesty as babies, but with regular handling, tame down quickly.
Rosy boas are also fairly docile, but occasionally, one will give you attitude.
Western hoggies act all big and bad (huffing and mock striking), but 99.9% of the time, its all bluff. They never actually bite you, and while a little squirmy as babies, they're usually puppy dogs while being handled.
Ball pythons are probably your safest bet, but I have come across several babies that are quite snappy.
Sand boas are usually placid once out of their cage, but tend to be cage-aggressive, and can be nippy around feeding time as well.
Children's pythons and their cousins, the spotted pythons, are often quite fiesty as babies, but with regular handling, tame down quickly.
Rosy boas are also fairly docile, but occasionally, one will give you attitude.
Western hoggies act all big and bad (huffing and mock striking), but 99.9% of the time, its all bluff. They never actually bite you, and while a little squirmy as babies, they're usually puppy dogs while being handled.