I think it´s a mix of erotic and dedicative body posture and great camera work with the focus on the actress with nice angles which show details like face expression and penetrating pussy/ass at the same time.
I know that we have different preferences, but I think there are reasons for the fact, that best-sellers are best-sellers.
And I hope that directors spend some time to analyse the key factors of best-sellers to go in the right direction and increase the sales of other scenes.
I have seen a lot of scenes which are equal to the "good example", but also to the "bad example". I wish there would be much more of the "good example"...

Good example
Veronica Leal roughed up & double penetrated by four men SZ2073
Veronica is almost every second the focus of the camera, in the center of the view. The penetrating pussy and asshole are clear visible, also her face and tits. It´s perfect, because (I hope) the consumer wants to see "her" getting fucked by big dicks and "nothing" else. Her body posture are very erotic and dedicative - an invitation for balls-deep-fucking. Maybe this is why this scene is the 2nd all time best-seller!?
Bad example
Mina assfucked by 3 BBC with panties on & creampie swallow SZ2413
I like Mina. There are great scenes with her. But this one is (imho) awful! Most of the time, Mina is not in the focus of the camera. Instead, there are a lot of moments with too much men´s ass and legs in front of the camera. Penetrating pussy and asshole are not clear visible. Her body posture shows that she´s not comfortable at all. There is no passion at all compared to the best-seller-scene with Veronica. A lot of Giorgio´s and Joachim´s scenes are like that -> Filming the actress in poor/cramped posture from a long distance when most of her body are covered with male bodies... and than.. for only 2 seconds you get a nice closeup... but than the previous crap camera work continuous. This is why I skip almost all scenes from Giorgio and Joachim.
Considering Giorgio´s Lab, I´m still interested in interracial scenes with Dylan Brown. For me, he is at the moment the last hope.
Unfortunately, Joachim´s Interracial Vision (imho) is a total desaster and a total waste of money. The scenes look like the actresses are on drugs and get fucked against their willingness. I found a couple of useful scenes with Megan Venturi or Sasha Colibri, the rest is crap. Sorry for that...
