Blackmail, humiliation (Ff, Fm, Mf) The gender part isn't that important to me.

Authors: Parker (the god)
Orestes
Cowgirl
ldcjrmc (The Nanny Author)
Dr Woo
The Weatherman
Cactus Jack
Musker (who usually ends up pushing further than I want to go, but is a genious anyway)

I like d/s, but like the mental aspects of it more than the physical. I've listed a few of my favorite authors. There are others, but these have made particularly fresh and different stories that have caused me to remember them.

I've probably forgotten a few.