While there is a thread running around extolling the impact of Max Hardcore on the development of "GONZO PORN", I submit that Rocco Siffredi is the true Godfather of current day porn.
Looking at the emphasis on hard anal sex, rough sex featuring slapping and light B&D play, POV shots, and palacial mansion sets and it all traces its roots back to Rocco.
Pop in a Rocco tape from the early 1990's and you would be hard pressed to tell the difference from a new release. Sure the technology has made some of the camera angles better, however the general tone and action would fit in with what is hitting the shelves now. Rocco developed a style, on both sides of the camera, for hardcore sex with no excuses. Although there might have been a fantasy element involved, it was derived from the outer fringes of of the sexual experience (fetish wear, latex, group gropes in the park, etc.)