[Pseudoscience-is-malarkey (OP)]

Other than "writing something that's interesting", what qualities do you appreciate the most in fiction writing?

[hamdani yusuf]

When the story is believable.
Minimize the plot hole.
In fiction, a plot hole, plothole or plot error is a gap or inconsistency in a storyline that goes against the flow of logic established by the story's plot. Such inconsistencies include things as illogical, unlikely or impossible events, and statements or events that contradict earlier events in the storyline.

[sciencefan]

Additionally, the writing style should be able to pull me along so that I feel like I'm in the story.
The characters should be authentic and realistic.