Generally speaking Bull tend to be all bark no bite, so long you work with them on a regular basis.
In a lot of cases their hissy stand with their tail rattling against the enclosure and their mouth wide open tend to intimidate people, but they are really great animals that like to bluff.
Care like most commonly found colubrid is easy (YOU need to do your homework) and they can be kept in anything from a v70 tub to a 30 or 40 gallons breeder.