Sexist tropes
My rant about misandry in Attack On Titan
How to rescue a character without taking their agency
The Omniprotagonist Fallacy
Time Skips and why they're dangerous
The Last-Second Rescue trope and how to avoid it
How moral choices in video games could be improved
How to make good moral dilemmas
On Chapter One
Tragedies
On designing heroes
On designing magic systems
Fake Sci-Fi - extremely common worldbuilding mistake