I've *heard* from experienced breeders that caramels are snappy for some reason or another. I don't think that there is any real data to back it up, but more than a few keepers have noticed that their caramel lines tend to be little more wild than other balls. That being said, I've held plenty of caramels without being bitten....
Spinning is the industry term for a neurological condition that affects the snake's equilibrium and motor control. Most common in the Spider morph, but I've seen as many normals exhibit the trait as I have spiders, so it isn't something unique to them like some may say. The degee to which these animals spin also varies greatly, with some just tilting their head to one side at rest, to others that violently flip end over end when you pick them up. The lesser affected animals lead completely normal and healthy lives and make find pets. The average keeper probably won't even notice the problem unless it is pointed out to them. I have a normal female that spins mildly, and she eats, sheds, and breeds, and none of her offspring have shown this trait. I wouldn't be surprised if the problem is incubation-related, as opposed to being genetic.
Kinking is a problem associated with lines of Caramels, however, as more and more are being produced and individual animals without kinks are being selectively bred, less and less are kinked offspring are being produced. You've got to remember that with these recessive traits, some amount of inbreeding is going to take place just because there aren't huge numbers of the morph, but as new blood is put into Caramels, the kinking issue should work itself out of the morph.
Also keep in mind the adult size difference between males and females when shopping for your snake. A well-fed female is going to exceed 5' and 3000 grams when fully grown, while males rarely get larger than 3-4' and 2000 grams as adults. If you are just looking for a pet, I'd say that a male of any morph would be your best bet, not only because of their size, but the price won't be as high either.