#54 - Cliches, and The Most Generic Space Fantasy

Stop me if you've heard this before - cliches and stereotypes are often frowned on in modern media, but once upon a time every popular idea was seen in full for the first time. There's a reason cliches work, and we break down when you should use cliches in your own stories, and how the mastery of the storyteller comes into play.
Prompt: Describe the most generic space fantasy!