Dream images

From past reading, it seems that scientists believe that dreams are a byproduct of the brain organizing information into something meaningful,moving the information into short or long-term storage.

What I’m curious about is that when I remember my dreams, they often include people and situations that I have never met, encountered or recall thinking about in my waking life. This doesn’t seem like the brain is organizing recent information.

And while many of my dreams seem to include some element of violence, I am not a violent person. My dreams are always dark and seem to occur in the nighttime. I never have dreams (that I remember) that are in the full sunshine, on a beach, walking peacefully down the street, etc. Is this unusual? Do others have similar experiences? What’s it all mean?