You can pretty much go for anything you like, as someone stated earlier, any snake can be bitey, whether their big or small. When I got my first snake, a Childrens python, his was quite bitey, but tamed up really quickly. Then I got a pair of Atherton Jungles, a bit bigger then the Tully or Palmerstone Jungles. They weren't bitey at all, yet they are suppost to be the worst out of all Australian pythons. Now that i have many hatchling Jungles, i go by that.. They are always trying to bite, their up and ready, even when they can see you throough the tub and their 3 metres away.
I have a pair of Spotteds, and they are really good, a little flighty, but other then that, perfect for a first snake. Also, i have a pair of Woma's, and they are very, very bitey!
Another member said his woma was very good, but mine are the total opposite, so it goes to show, whether its a carpet python of some sort, a woma or black head, or a Antaresia, either one of them can be a bitey snake.
Yet with a lot of handling and attention, it will soon calm down, and it will be fine.
My recommendation would be a Murray Darling Carpet python, they do get quite a size to them, but are quite pretty, i have two hatchlings, and they wouldn't bite anything, they won't even bite a rat for me.. Haha.
It's really upto what you like, if its down to a size thing, Children's, Stimson's or Spotted's are the one. If size doesn't matter, anything could be what you want. Check out Black Headed pythons, their beautiful!