I found the following preface by Philip K Dick interesting, as I had never stopped to really consider what sci-fi is, let alone good sci-fi. To be honest, I had been feeling a little insecure about the sciency fictiony aspect of my intended major work. It felt more social drama (movie genre) than science fiction, although the science fiction aspects are definitely there and even more so in the later novels. Then I read this preface, and appreciate it because 1. it made a lot of sense to me 2. it showed me that space and tech do not have to be involved per se for a novel to be considered science fiction, and that the sci fi I have enjoyed was probably more space opera (lookin' at you, Dune) 3. the goal of my novel is to engender that "chain-reaction of ramification-idea" experience in my readers I have not spent a lot more time thinking about it, but am curious what other writers consider to be good science fiction, or even what science fiction is for you. Apologies if it's too much copy+paste. From: Volume one of the collected stories.