My black cat, Star II, is like that, he sleeps through visitors. Gideon, on the other hand, always has to come and inspect visitors, no matter if it's friends or strangers.

I have three. Two run away from the door when the bell rings, and one runs toward the door because he likes visitors.

LOL!! My kitties scatter to the 4 winds when the doorbell rings, or when someone new enters the house. They return quickly when it is Daughter #2 because she is over here at least weekly and she loves kitties. When the grands are here they disappear when the adults come in, and then come back out when it is just the kiddoes. If it is a stranger they're out of site until the coast has been clear for at least an hour, or until they're hungry.

interesting

As they are the owners and masters of the house, they know you are a good security person.

Ferocious