@DaDemonGod never stop writing and coming up with new and fresh ideas.
Inspiration is found everywhere around you.
A movie, anime, manga, music, and even in your average everyday life.
Or even a video game can be inspiration for fanfiction stories. It's just a matter of what you like and how much effort you put into the story itself.
I've got nearly 2 million followers because I'm always asking people what kind of stories they would like to see me attempt next.
It's always a good idea to get the people's opinions and pay attention to the comments they leave at certain chapters to decide what direction to take the story in future chapters.
The only limit to an amazing story that separates it from a good one.
IS YOUR IMAGINATION!!!