Sex and Violence
In most genre books I skip the sex scenes and the fight scenes.
All the fight scenes tell me is you the author have watched The Matrix (or MMA matches or Crouching Tiger, Hidden Dragon) enough times to describe it.
All the sex scenes tell me is you have an internet connection.
Having just finished a Western (Valdez is Coming* by Elmore Leonard; I recommend it) I saw it wasn’t these two things but the lead up and repercussions from them that made things interesting. It’s only that people are obvious and put pages of dueling MMA wizard anal elf sex in their books for some reason. If you love it, then hey, that’s great. But for me, it feels like I’m reading the fan fiction for the RPG supplement you wrote in novel form.