I have, for as long as I can remember I've had a bit of an issue* with excessive daydreaming.
Quite a many times daily, often up to an hour or more, I kinda just pace around and find myself absorbed in my imagination, into a world of fantasy that has evolved as I've grown older, the world I daydream about doesn't change too often, but whatever I happen to be doing in the world is completely disconnected and there's no story (There's a backstory that changes infrequently, but I mostly think about big climatic scenes and what have you).
Have I been watching a super hero movie? My daydream will be structured like a super hero movie.
Playing a JRPG? I'm daydreaming about being a character in a JRPG