Stories of the dark nature of man always intrigues me. Of the pure being drawn over to the dark, being tempted or teased with such things. Of the darkness finding just that bit glimmer of light and keeping it for themselves. If you have ideas for something like that please IM me, I'd love to see if our writing patterns match up. Some examples would be the tale of Persephone and Hades, Dracula, Crimson Peak, anything of the Gothic Romantic era as well.
I am also not opposed to dipping into the realm of the modern takes. Of controlling CEO's, Powerful drug lords, and etc... Of a modern Nightingale story or perhaps a forbidden love affair.