Well then:

-Executions. Simply the suspense of imminent death drives me insane. It's like a drug to imagine pushing someone helpless up the stairs to the gallows. I like any setting, as long as the method is authentic

-Non-Con: Goes along with executions. Struggles are sexy, especially if the desperation is noticable.

-Mindbreaking: Goes along with non-con. I prefer a state where the victim is still fighting, but finally accepts the imminent. This also means that I like to play with hope, just to crush it in the end.

Medical detail: I'm not talking about dislocations between c3 and c4 (though that would be sexy too) but something like *looses the head and dies* is a huge turn off for me. It surely doesn't have to be realistic, but some details are always nice.

-Hangings: I tend to drops (usually standart or long drops). I dislike hoistings and hate short/no drops. Those kinds of hangings are used by poor studios that try themselves at those kind of things.

Decapitations: As long as they are quick and precise, I like them. Having to smash a neck multiple times or slice the head off is just boring as it'll be dead before it's removed.

Other commonly used execution methods: I always try to think of something I could realise myself or a state could realise. Aside of that, since I imgine myself as a executee too, I try not to think of something inhuman.