I like stories that don't take themselves seriously as I hate it when games need 2 hours of story before I get to the goodness, like come on, I've been fapping for 2 hours, give me it !
But anyways my fetishes include stuff like (male protagonist) : male domination, rape, bondage, surprise penetration, massage, sumata/intercrural sex, harem, a mix of being a good and bad character (sometimes I want to be a good guy, but I also want to have the option of being both a good and bad guy in any scenario), tons of choices that actually change the content...etc.
As long as you don't deliver a generic fantasy story, I'm fine, I've even built up an immunity to the generic step family story.