I listen to a ton of different music, and most of it is repetitive for a few weeks until i forget about it.
Why is music relevant to this conversation?
Because my #1 source of characters, scenes and novels themselves comes from the music I hear on the radio or listen for about a week.
My Writer's Camp entry is a novel that branched from the title and song "Natural" by Imagine Dragons. It morphed from an idea about humans in an end-of-the-world situation to a group of robots years after the end.
The characters of the novel were (In story order) inspired by songs such as:
Jonas Blue - Rise (though the character morphed to not suit it in development)
ZAYN, Sia - Dusk til Dawn
Selena Gomez - Back to you (I actually heard all these songs up to now back to back on radio and didn't know this one until i found it on youtube)
Lady Gaga - Bad Romance
As for my other novel, that needs some renovation,, I actually don't remember its inspiration.
Some other of my works have been inspired by mythology (an abandoned BL plot, my current work im going to be likely publishing) or daydreams (an old GL I had on Tapas, Liberosis. Now deleted.).