Personally, I can enjoy any setting where I can have two (or more) shirtless guys fighting with knives, swords or other bladed weapons (guns and arrows are fine as well, but I prefer melee engagements). That said, I tend to prefer modern day settings, although I like to have them mixed with more "fantastic" scenarios that aren't based on real life situations; an example of what I mean would be the Modern Gladiators series, which has a modern day setting but also a (sort of) sci-fi plot that ultimately serves as a justification to have shirtless guys in jeans stabbing each other in the belly (which I personally love).
Besides modern day, Greco Roman is a close second for me; that kind of setting lends itself very well to our kink, I think. Military would be my third favourite, as long as it focuses on close combat.
Also, like other users, an excess of realism tends to turn me off, although I don't really mind blood; realism (or lack thereof), for me, tends to be more in other details such as the victim's reactions, which is the kind of thing that would turn me off if it felt too realistic.
Besides modern day, Greco Roman is a close second for me; that kind of setting lends itself very well to our kink, I think. Military would be my third favourite, as long as it focuses on close combat.
Also, like other users, an excess of realism tends to turn me off, although I don't really mind blood; realism (or lack thereof), for me, tends to be more in other details such as the victim's reactions, which is the kind of thing that would turn me off if it felt too realistic.