Where do I begin?

I'll not describe my nightmares, as they are rather... disturbing, but here's one of my best-remembered dreams (that is sometimes also disturbing, but less so).
There's one dream that I've had variations of repeatedly for years: I'm in a mostly barren mall that has never resembled any mall I've ever seen, but it doesn't look overly strange either. It's just large and underpopulated.
The stores themselves are what is peculiar. One is a gaming store, like GameStop, but in some of the dreams it is jam-packed with merchandise, much of it very rare. In others, it's almost empty. And the store is almost always located on the top floor of the mall, which alternates between two floors high and three floors high.
Next to that store is a bookstore. For some reason, I've never been inside it, but I can see odd magazines lining the front display. They are full of crime scene photos and medical documents, each gorier than the last.
Surrounding these are nondescript stores that I never focus on. At one end of the top floor is a tiny, inexplicably misplaced theater that I've only seen from a distance.
The bottom floor is just as weird. There's a variety store of sorts, which has an enormous prop gumball machine in the window, and an assortment of gewgaws and clothes within. When one of my mall dreams has a "plot", it usually takes place there.
Then there's the arcade. It never stays in the same place twice, and it's contents are always dramatically different. Old games, new games, fictional games, even racing games that use Styrofoam cups as steering wheels.
Finally, there's the most surreal part: the video store. They seem to only carry two types of movies: Classic 80's horror franchises, and gore videos. (Faces of Death type films, minus the fake. Snuff, to be exact.) The walls are covered in red tinsel, and the snuff films are constantly playing on the displays.
I have no idea why I have these dreams repeatedly. Obviously, the stores represent some of my interests: Movies, games, books, and the taboo. But the purpose still eludes me.