There are a lot of ideas from real life that make their ways into "A Dozen Morning Glories" and while I wouldn't say the story is accurate enough to life to be considered "almost nonfiction" quite a lot about the different character's struggles come from people I know, or myself. Someone I know even said he felt represented reading the first chapter.
I think one of the most major ideas that stems from real life is trying to make other people satisfied with you at the risk of your own emotional well being, especially when you're in emotionally abusive scenarios. Colorism is also an issue in the male lead's life and it's something I've lived with first hand in my country.
If we look at it this way, most people are probably writing things at least somewhat inspired by nonfictional that comes from their own personal lives