Hamsters are small, loveable pets. There are a few species of domesticated hamsters, some species being dwarf hamsters - smaller hamsters - and a species of larger hamsters being called Syrian hamsters. Each species have different traits, just like each individual hamsters have different traits. They are all their own beings with their own personality, something true to all pets and something everyone should remember. For hamsters, this could mean the hamster is quite friendly, or the hamster may not like to interact with others at all. If you are planning on getting a hamster, you must be prepared for a hamster than does not like interaction. Unless you are okay with any preferences your hamster may have, you should not get one - that is not fair to the hamster if you are not okay with it's personality. That being said, if you are adopting from an ethical breeder, you can ask them for a more friendly hamster, or a less friendly one - which ever you prefer. 

No matter your hamster's preferences on human interaction, all hamsters do not get enrichment from interacting with others and are solitary creatures. That is why they may not seek interaction from you in the same way an animal like a dog might, one that needs interaction with other beings.