I don't know if this counts, but I'll throw in my two cents. Visual stimulation doesn't do much for me unless I am looking at my partner, then I'm open to anything in terms of photos, video or real life watching.

Beyond that, reading erotic stories does the most for my own stimulation. It's left to my imagination to generate the images and I find myself absolutely immersed in a well-written erotic story, which can be of all sorts of categories/topics, especially domination/submission and "chance meetings/just met" scenarios. I enjoy reading anyway, of so many different genres, which includes sex stories. Erotic fictional work is my favorite pornographic material!