Hey, Rat fancier here and AFMRA member. Use to breed mice (texels and angoras here) and a big time rat owner. I can say for the past 10 years now I have been keeping rats over mice and I love them so much more (still love mice but not as much as the rats). They are super smart and easy to litter train, they learn a large variety of tricks, and they actually as so fun and funny and playful. Girls can tend to be a bit more skittish until they warm up to you but BOY wait until they get use to you, they play hard. My girls like the wrestle with my hands and have me chase them and play with cat toys and feathers on strings. Boys are more lazy and love cuddles so depending on what you prefer. I have one neutered male rat who is just my lap boy and enjoys being carried, held, and petted. I also currently have three girls who are my crazy wild trouble makers. Be certain to rat proof any room they can free range in and by rat proof baby proof, puppy proof, kitten proof a room. They get into everything when they get bored xD. I am sure you will enjoy them so much, they are such fun smart little pets and so social with their humans.Just a little warning if you have other smaller pocket pets or reptiles, some rats can high prey drives and will try to get at smaller rodents/reptiles if given the opportunity. Some of my old rats were actually amazing mousers and killed more mice who got into the house than our cats.