Hognose snakes are technically rear fanged venomous. That said, the venom is mild and they do not bite defensively. However, feeding response bites are possible, particularly with females. Their temperament is all across the board -some individuals are quite calm, and others are extremely high strung. But the most high strung ones will still not bite defensively, they will flatten, hiss, bluff and closed mouthed strike. The worry for bites is at feeding time. Here is a photo journal of a guy allowing one to chew on him, and the aftermath:
http://www.herpnet.net/bite/
Western hognose are my favorite serpent to keep as a pet. I LOVE their little attitudes and quirky behaviors. Understand a few things about them before making your selection, and if they fit the bill of a snake you want, you'll love them too. Females are about three times the size of males on average. Females also take feeding time more seriously, they remind me of moray eels when they smell food, sweeping around mouth agape and biting their waterbowls, themselves, or whatever might get in their way. Males are are typically more gentle feeders -many of mine won't eat unless left alone. Males are prone to go off feed and refuse food for long periods of time, often losing a lot of weight and worrying you to death. You can try every trick in the book, even live toads, and they simply will not eat again until they are ready. Babies can be very tricky. Babies can decide they don't like f/t after eating them for many meals. I have had them that would starve and die if I didn't scent/offer live/whatever trick worked. Then one day they will be happy to take f/t again. But adult males going off feed don't take to tricks, they seem to be in breeding mode, not eating mode, for a month or two at a time. The ones that really pace the cage really lose weight quickly. I have even let them breed to see if that would break the fast, but it doesn't seem to.
I wouldn't buy a snake from this guy, but he has a nice caresheet:
http://www.extremehogs.com/Caresheet.html