I like the ladies. They explore a ton and are really friendly. My boys sort of just lumber around and seem like they could care less that I'm there or that there's anything else in the room with them. They also had to be separated because they started fighting and I would have liked to neuter them but it's pretty expensive. I would also urge you to go to a breeder or rescue (like someone else said) as pet store rats don't seem to ever calm down. I have rats from a litter that I handled since day 2 and they're the most amazing rats in the world. Any of the rats that came from a pet store are skittish and ornery.