This describes my black cat exactly; she runs and hides at the door bell, but when it all calms down, she inevitably comes out to see who it is and within half hour is trying to climb in their lap and is begging for attention from the new person. I had an orange cat once and he pretty much thought he was the family dog. I’ve never seen a friendlier cat, didn’t matter if it was another cat, a dog, a person, or a squirrel; anyone who would play he was ready to go.