I've been letting this ruminate in the back of my mind, and I honestly think that the most surefire way to get reviews or reactions of any kind is to stick to the more popular fandoms and fill the story with sex, no matter how improbable or unlikely, particularly slash.
There are authors here, both in Originals and in various fandoms, who are extraordinarily gifted writers. They create memorable characters and vivid settings, and if it's a fandom, they strive to bring a unique perspective. And yet they get little to no reviews. Maybe they don't cater to the "in" pairings, or maybe they would rather write about a heterosexual couple. Maybe no one gets raped, kidnapped, sold into slavery or transformed into a demon/vampire/werewolf.
Dame Barbara Cartland wrote to a formula, and even when her initially "racy" novels became "tame" with the changing morals of the times, she was still intensely popular. She found something that appealed to a wide range of readers, and she stuck with it. As far as I can tell, if you can come up with a young boy who's been kidnapped and sold into slavery and then loses his virginity to his gay demon/vampire/werewolf owner-cum-lover, you're on the way to review heaven. If you can make it work in one of the more popular fandoms, not only can you hit review heaven, you can later edit it into an original work and publish it to great acclaim.
::removes tongue from cheek and saunters back off into dignified obscurity::