Very interesting thread indeed.
So, my turn, i guess.
Like most people here, it seems, I like something that can be believed in, even if it's not 100% 'historical'. My preferences are medieval times, ancient times, heroic fantasy and sci-fi (in that order). Not that I won't like a good 'modern' story, with beautiful captured female spies and the like, but it's less my thing.
The storyline is of course very important. It should be all about storytelling and physical torture must be consistent with the situations described, not gratuitous. That's why I would say: 'Blood and gore: yes, but it must 'naturally' ensues from the storyline, the psychology and the decisions of the characters.
I pay particular attention to the interactions between the victim(s) and tormentor(s), and to the fact that the victim is brave. Of course she may (must) go through a whole range of emotions, from cold defiance to distress and even despair, but I see no point in torturing a wimp.
What I most like:
- the tormentor ending up feeling respect for the bravery of his victim and even feeling bad about what's happening.
- the tormentor and the victim being 'trapped' by a situation they didn't really choose but having to 'perform their roles' because of sense of duty, social pressure, excessive pride and so on ('I don't really want to hurt you, but I've to.' I don't really want to suffer, but I have to').
What I don't like at all: violence without imagination (i.e. beating a woman by punching her), vulgar language being used without purpose (if it's about humiliating the victim and used sparingly, it's OK), 'quick' methods of execution (beheading, hanging, bullets, ...)
Sex: yes, of course, but it's not absolutely necessary for me. As long as there's a 'sexual' dimension to the story, it's OK. Again, a lot can be expressed by the characters changing attitudes and emotions toward each other.
Humor... Well, I can appreciate some humoristic / sarcastic remarks from the characters, only if, once again, it realistically fits within the story. For example, in Wragg's 'Chronicles Of The Silver River', Barbaria telling him from her cross: 'We’ve spent the night together in the nude and I don’t even know your name' was absolutely great...