I'm usually trying to keep rat numbers down but I'll tell you this story.
A neighbours child had a pet rat and very dear she was. A friend had another. Could first child look after friend's rat whilst he was away? Is it another female? asked parent. Of course!!
The result was a litter of baby rats one of which was given as a 1st. birthday gift to my younger daughter.(she is now 32)
I made her pick it up when it needed cleaning out etc
BUT, to my surprise, this little creature became one of our best loved pets. The sight of her sitting up with a baked bean between her paws is etched forever on my mind.
She spent a lot of her day in my jumper sleeve, appearing at the neck to frighten the postman
At other times she lived in a plastic tank in a corner of the living room where she was loved by all.
When she eventually died of old age it was as though a light had gone out in that corner and come what may it never came on again.I think of her quite often.
So, though I don't want another pet rat I would reccomend one to anyone,only don't look after anyone elses
I hope you find lovely homes for them.