While I give you full marks for effort in your enquiries, I really believe this is none of the many areas where 'you should just know', due to the mysterious combinations, of telepathy, interpersonal chemistry, reading his skin-tension, listening, whatever. General tips can help but everyone's desires and experiences differs, and the trap with seriously researched general procedures is that they can drown out the faint hints coming from one unique individual to another.
My own example being the sometimes intense discomfort, verging on real pain I often feel in the tip after ejaculation, most often from BBBJs. It's hardly the moment you wanna shreik, "Jeezfuckoohargh!! No! Stop!" and even if you do, it can be misinterpreted as pleasure, and she—bless her—may redouble her efforts. For me 'spurt=stop', but gently. It's not a crash barrier. And while a mouth garter at the base is swell, anything around the tip is right out. Other guys would tell you the opposite. Same with To Suck, or Not To Suck.
My advice: Gather these response and ponder them to improve your technique; it's laudable. But on the job, train yourself to ask that client everyone of them again, everytime. Even if you use no words, in fact better if you use no words. "Is it getting better for him? Is it better here? Or here? Is this the moment to stop moving and hold? If I don't stop, is it still getting better?"
Asking the questions consciously and silently in the moment will serve you and your clients better than a thousand survey responses.