So cute. I got my rat Gina a year ago as a Xmas present from a former coworker.
She's grey and white and i love her. She is smart and will go near the cage whenever i go near the doorway. She sits up and waits for her daily treat yogurt drop. If she doesn't get one she will act out/act up. Kind of like a kid who has a temper tantrum. She loves to sit on my shoulder and curl up there. I don't really take her out of her cage much due to all the other animals but she is the sweetest most loving rodent i've ever had. Yup no cedar chips either. It's paper.
As for hamsters i've had two really mean ones. The first one not too mean but still and i got her from PetSmart. She died and then i went to replace her with a very smaller meaner one and somehow she or the cats got her out of her cage and she was toast 2 weeks into having her. So i went to a pet store by our house and picked randomly. The hamster i have now is super duper sweet. He's a black long haired teddy bear hamster. I can actually pick him up bare handed. I can't do that with any other hamster. He has tried to bite me but somehow never has broken the skin. He loves to be held and will just sit in my hands letting me pet him for minutes. He loves his ball which i put him in while cleaning out his cage. If i were to get a hamster as a pet do not get one from PetSmart or PetCo i'd go to a petstore where they use hands on with the small animals and really do some investigation.
Rats the ones we sell at PetSmart are ok considering where Gina came from.