Firstly, I'm so flattered anyone would even consider writing fanfiction based around my work! That's awesome, and I would absolutely love that! However, you may not publish, sell, or otherwise profit off that fanfiction. This includes original fanfiction set in the ‘world' of my stories, as well as my characters, maps, settings, etc.
As for reading your fanfics, or plot bunnies, I have to politely decline. Though I think it's so cool that you're that into my stuff, I have a limited amount of time, and no shortage of ideas! Plus, there's legal reasons. If I wrote a novel that seemed similar to your fanfiction or plot bunny, you could potentially sue me for copyright infringement, and that's definitely a headache neither of us wants.