Having come to Hive as a game player first and then slowly figuring out bits and pieces about the blockchain, I would have to start my story with Splinterlands.
For me, Hive is home to the best, decentralized strategy trading card game on the planet and has allowed a wonderful in-game ecosystem to develop. Happily for me, I can also blog and vlog on it immutably and earn rewards for sharing content -- a win-win!