They may form a familiarity to the person who is most involved in handling and daily husbandry. By familiarity I mean a sense of security around that person; whether it be scent or body chemistry I'm not sure. The bond is nothing close to what you may get from a cat, dog, or horse but they will act differently around things which are familiar to them.
I know my ball pythons will be calm being held by me and become restless when being held by strangers. Whether its a bond or the fact that I'm calm and the stranger is usually nervous I'm not 100% sure.
This is just my experience with ball pythons; some of the larger species keepers might have differing opinions.