Horror.
There's a lot to do with horror, and I find that it meshes really well with other genres. Horror romance, horror comedy, horror noir, horror slice of life.
Not to mention all of its subgenres: folk horror, cosmic horror, Gothic horror, slasher horror, etc.
I dunno -- it just gives off a certain vibe and aesthetic that kinda lures me in. Even more, I find it makes room for a lot of experimental stuff, especially when it comes to abstract visuals and symbolism.