Which authors have had the most influence on your writing style? Not necessarily the authors whom you enjoy reading the most, but the ones who influenced your own writing the most.
For me, it would be Jean-Jacques Rousseau and George R. R. Martin. Works like Les Confessions, The Social Contract, and Emile showed me that you can draw from subjective emotional truths for writing ideas, and that any work that does not leave the reader with something that the reader did not have before reading is not worth writing. GRRM inspired me with how much glee you can take in writing sensory descriptions. My descriptions, especially of food, have become way more vivid after reading ASOIAF.
Honorable mention goes to Aristotle for Rhetoric. Although I've only read one of Aristotle's books, I think that Rhetoric is the best textbook on writing that I've ever read.
(I wasn't sure whether to put this in Writing Workshop or Reading Corner, but I figured that, since it's more focused on writing than reading, I'd put it here.)