Depends on what you mean by venomous. Technically, hognoses are venomous and I've got a couple of those, however they aren't dangerous to people. I don't think I'd want a snake that could kill me or put me in the hospital with a bite though many of them are very beautiful and I could sit around watching them for hours.
On the other hand, I wouldn't mind adding some Gila monsters to the collection one of these days. While venomous, I don't think there have been any deaths attributed to their venom.