I tried to convince my parents to let me get rats but my dad thinks they're vermin </3 but I did do a lot of research on them so this is a good question to ask me haha!!!
-they're super intelligent, almost like dogs!! they can be taught tricks, their name, and they can even be litter box trained
-rats that you get from a pet store or breeder or shelter are not vermin in the least. it's not like they went outside and caught wild rats that carry diseases. pet rats are super clean (they clean their fur like cats) and as long as you get them vaccinated they won't spread any disease
-rats are social animals, so I'd recommend getting two or more
-they're so cuddly and cute wth!!!! they're precious little rodents that love affection (depending on the individual of course)
-they can get kinda pricey, the most expensive thing you'll buy for a rat is probably their bedding
-they don't eat live insects or anything so you don't have to worry about that if it makes you uncomfortable
-their teeth also grow constantly throughout their lives so you will have to provide them with things to chew on
from what I know they seems relatively low maintenance, change their bedding once a week or just spot clean, fill up their food and water as needed, and give them a little lovin from time to time!!