I have a thing for Kiki from Real Spankings Network (though, I am not sure she is still making videos). Her reactions just seem genuine to me. Some examples:
https://xhamster.com/user/video/colo_aeg/new-1.htmlKiki is the asian model usually in a school girl scene.
I would have to say the most realistic scene I have found is the Real Spanking Networks scene with Kailee and her real life sister that goes by Lily. Supposedly Lily is the older sister, but Kailee I think works better as a top. The scene where Kaliee gives Lily a hairbrush spanking is my favorite. Very real reaction, lots of tears, but also humiliation and anger on the part of Lily and then some sisterly affection at the end.
The scene in particular can be found in the comments on this reddit thread:
https://www.reddit.com/r/Spanking/comments/3r3lgi/anyone_know_who_the_spanker_is_in_t his_video_or/cwkt9bf/edit: fix spelling and add links