Does your cat respond when you call their name?

I have two cats and one responds to his name all the time and the other one completely ignores is. It doesn't matter where Merle is on the house or what he is doing at the time whenever you call his name he comes running. It is too cute. We will hear a noise in another room and we will say, "Merle what did you do?" And he will coming running in the room we are in just cause he heard his name. I haven't had many cats that actually respond to their new. Most of them just ignore you.