As the topic says, what goes in your basement? If you have one, I would like to know about it.
What it looks like? What you have kept there? How much you use it?
If you have any screenshot, post it here.
For my part, I have a small basement room. It is made completely of masonry, including both walls and floor. It has dim and not much lightning. I always have some extra/unused things, so I keep them in the basement. I also keep my gym equipment down there. There are many things down there, like my inventing platform, my old tattooing machine, my generations old painting stand, etc. I also have a reserved bed and a music system there. Most of my sims rarely bother to go there, except a young boy and his sister. This boy mostly throws parties, so I keep a TV and a fridge there. In a corner, there is also a bookshelf, so that no one turns the house upside down just to find a book. His sister goes there when she washes clothes, or just when she wants to be alone.