I don't think I can choose either of the options here, because I might well recommend a BP to one person and not to another. It also makes a difference where I'm located, as it's not legal to keep corns here without an educational license. I'd certainly recommend a ball over a bcc or a burm, but I might well suggest a (Cali, 'cause they're legal) kingsnake or another colubrid instead. On the other hand, balls tend to be very docile and obviously don't musk, so I would recommend a ball as a good snake to introduce someone who's afraid of snakes to.