I like the idea of fiction "as an exploration into a concept". I've seen a lot of people complain about Cixin Liu's Remembrances of Earth's Past trilogy because

I like the idea of fiction "as an exploration into a concept". I've seen a lot of people complain about Cixin Liu's Remembrances of Earth's Past trilogy because of plot holes or unrealistic elements, but I just appreciated the exploring how humanity might respond to an extra terrestrial threat, or what effects future technology, or disastrous climate change might have on human cultures. Heinlein's Stranger in a Strange Land and Neal Stephenson's Anathem also come to mind as unique "what if" explorations.