Thank you for posting this. I do this often. With my increase in age, I tend to only have them in my head, where in my teenage years I would actually act them out. I create scenarios in my head and follow them through until I am fulfilled with their outcome. When I am alone, I usually revert to a few, now well developed, story lines. They are kind of an immediate rush, as I do not necessarily plan these episodes. I can usually turn them off when I am at work, but sometimes I do not even realize I am in my own world till some time has passed by.
The thing is, it really hasn't affected my life at all. I am very social, do well in school, and do not have a hard time focusing at work, at least not because of daydreaming (work is not very stimulating as it is).
When I am finished with these daydreams I usually feel some level of fulfillment or release, as if I just wrote a poem or a short story or a journal entry. Especially when I listen to music and pretend to be a band member. Or I see and film and create a side story line where I might be a character.
I have never actually explain this before, but its quite interesting to know that others cab describe exactly what happens to me.
I guess a 'thanks', is in order.
I do it as well. I have always done it. It does not interfere with my life in general. I usually only do it while driving in the car. I do try to concentrate on the radio because sometimes I get to work and I wonder if I even paid attention to the road. But obviously I do because I'm not wrecking the car on a constant basis. So from my own perspective, I don't think it is "weird." I think that in my case is is just part of my OCD. My mind is always going 24/7 and this is just one of the ways my mind works.
I do the same its normal for me though