I've got a pair of Sumatra Red Bloods and they are both baby tame and always have been, even as baby's. They are about 1 1/2 years old and have never been "hissers". They both have the best personalities. They seem to like to get out and visit ( ok probably in reality, they don't mind it ). I've owned many snakes over the years but my Bloods are on the top of the list of favorites. I believe baby's born from tame parents makes for tame baby's.