I write a lot, and like Jennifer said, my stories normally have a bit of realism to them. However, I'm usually anchored around a certain feeling or situation & the characters are growing or improving throughout the story.
Very similiar to Alice Sebold, actually - Jennifer, thanks for bringing light to her as a possible INFJ. I knew I related well to her style of writing & I couldn't pinpoint why. In both of her novels, the characters are put at a disadvantage and then rising above it & growing from the experience.
I've written stories where a character was from a unfortunate family situation, drug addiction, etc. The story would focus on what that individual character is feeling and doing to improve their situation.
As for reading, I tend to read all sorts of books. I can certainly handle the abstract, some sci fi, and I do love fiction. However, I tend to like travel literature (I think because I travel often & everytime I read about someone's travels, I get motivated to put more money into my savings account for my next big trip!) and I also like non fiction IF it is focused on human struggle and perseverance. Stories about accomplishing goals tend to motivate me as well.
This all probably ties in with the stereotype that the INFJ is the "self help" type. I certainly see that in my reading & writing.