Syrian Hamsters are anti-social animals and my take on them is that they just want to eat and play on their wheel and really honestly would prefer to never see or interact with humans. I think that their temperament is particularly important for people with children to consider. An adult can understand the needs of a temperamental pet, a child is much less likely to. Having gotten over the personal stuff, there are a few specific things. Hamsters produce a fairly pungent urine and their cages can be smelly, although this is ameliorated by the fact that they should be kept alone.
Hamsters are very noctural and spend most of the day in a very deep sleep.
If they are woken suddenly, even very tame animals will bite because they are frightened and, like humans, a bit irritable when woken. Special Care Syrian Hamsters are not social animals and must not be kept with others of their species after they reach adulthood. While it is hard for many people to believe, hamsters really do want to be alone. They will fight with others and eventually one will kill the other. The only exception to this is if you are breeding.