The only reason I put that last one in is because it wasn't personal preference. They were saying that the reason one of the BP's was bitey was because the guy kept it in a tub, which is false. As long as the enclosure is a proper size, aggression should have nothing to do with it.
Plus the guy had at least 10+ snakes, and who wants to completely clean 10+ glass tanks every month? Tubs are definitely easier with multiple snakes.