Info-dumping is a huge pet peeve of mine and seems to be trendy at the moment. Nothing shuts a book faster for me than starting out with, "I gazed onto the horizon, still haunted by the twelve years I spent in an orphanage after my father was killed in the war of Analondo, having given his last coins to purchase my Minkpapa, or Moon Stone, which channels my innate energies into prismatic rainbows that lure the Enchipis, or fairy pupae, to my side for battle against the Gwarks of Rivenwarp."
Like, please! Just let me get into it before slapping me across the face with all this nonsense. Once I get attached, then I'm all about Moon Stones and Gwarks and whatever else you want to add!