I'm a cat person, but those are some awesome rats, they look so happy!
They live like kings so they should be
Also they make good household slaves cleaning up bits of food you dropped on the floor (comes pretrained), taking socks to the washingbasket for you (requires selftraining), undoing your shoe laces (also requires self training and a will too buy about 30 new shoelaces until they realise it isnt a treat to be eaten) and of course you can make them stand and worship you like dutiful subjects in exchange for a mere sunflower seed. Rats are very rewarding pets.