Personally I give each character a face, either from a person I know who matches their personality or a celebrity that fits the description, even though sometimes it can be really annoying if the author gives more details on the persons appearance and my character doesn’t fit that lol. I’m very curious as to what other people do.
Yes. Books, especially when I get into them become hallucinations as I don’t even feel like I’m reading. It is more a film in my mind watching the characters act or speak.