It depends on personal taste. Some people love Ruby Dixon's work on Fantastic Fiction because of her creative world - building. However, others might find it not their cup of tea as her writing style could be a bit different from mainstream. But overall, she has a lot of fans who enjoy her contributions to the genre.
Ruby Dixon writes various types of stories in Fantastic Fiction. She often writes about adventure - filled tales with strong female characters. These characters face different challenges in strange and exciting worlds.
One common theme could be loyalty. Given the nature of Daryl Dixon's character in the original show, loyalty to friends or comrades like Gene Dixon and within the context of Trinity might be a big part of the fan fictions.
Daryl Dixon isn't gay in the comics. The storylines mainly revolve around his adventures and struggles in a post-apocalyptic world, not his sexual orientation.
It depends on their popularity and the creativity of fans. If people are really into their characters and potential relationship, fanfiction could definitely exist.
I don't think Dixon Hill is a real novel. It could be a name given to a fictional work in a movie, TV show, or game, but not something you'd find on the shelves of a bookstore as a genuine novel.