Seems like it's time to experiment with different genres and types of pornography. Sometimes you have to wallow thorough a lot of mud to find a dry patch of land to settle on.
Its unfortunate you can't find any good erotic fiction, I find that's usually where the most diverse and relatable stories lie, with some actual emotional buildup at times rather than the "in medias res" approach which everyone probably gets sick of eventually. I'd say to explore this genre some more.
Eroge and certain hentai also offers more elaborate scenarios (though some of it can get pretty bizarre and unpleasent as well, so choose carefully). Check out some of NeutralDrow's admirable [http://www.escapistmagazine.com/forums/read/326.135672-Neutral-Drow-reviews-A-Drug-That-Makes-You-Dream] reviews [http://www.escapistmagazine.com/forums/read/326.206764-Neutral-Drow-reviews-Kana-Little-Sister] of a few eroge; I'm quite tempted to try out one of these based on the immense depth and emotional impact those reviews convey (though I doubt they'd have quite the same effect on me, and they seem damn expensive to get hold of legally).
In the end, its all utterly subjective what'll end up floating your boat (that day), but with an offering that's never been larger or more diverse (which may be part of the problem), there should be something out there to suit you. Otherwise, pick up the pen and write/draw something to your liking.