I agree with the rats! They're wonderful pets! Definitely gotta be in pairs or more. They're fun, affectionate, can easily be trained to perform tricks, cuddly, etc.
These are the three rats my friend Kyle owns. Their story is an interesting one. I was given a fuzzy rat (a fuzzy is a baby rat who has a bit of fur, but eyes are still closed) who wasn't eaten by a ball python. So I raised this tiny rattie on formula. My elder sister, who keeps rats, agreed to take her when she was old enough, and asked me to get her a buddy first. So when Mouse was bigger, I got her a friend from the petstore. They bonded. But it turns out, the friend was preggers! And so nine more were born. She was a great mother, at least! Kyle and I handled those babies from only a few days old, as their mother was cool with it, and to socialize them. The result was ratties that were so utterly tame and loving. So Kyle kept three girls, and we found homes for the boys, and Mouse and her friend finally went to my sister.
The three in the video are the girls, Shrew, Panda, and Gecko Paw. Kyle actually gives them the run of his bedroom (he owns a house) when he is home. The rats go potty in their cage, put themselves to bed, and never chew on anything they aren't supposed to.