I rescued a baby bull in college and he was a pistol. Easy to keep - great eater! - and beautiful, but he would rattle his tail against the side of his cage anytime you'd get near and hiss like he was ten feet long. They can have attitudes, so you just can't be afraid of them. With handling they'll tame down.
Other than that, I kept him in a basic aquarium set up and never had any issues. Very very easy to keep as far as that goes.
He ended up going to a good home with someone who could appreciate him, and he calmed down quite a bit as he got older.