…And I Show You How Deep the Rabbit Hole Goes by Scott Alexander
This one is just a short story, but what fun it is!
A bunch of twenty-somethings take magic pills that give them superpowers, based on a meme that was floating around on tumblr a while back, based on the movie The Matrix. The green pill gives you animal powers, the pink pill gives you love powers, etc. Then Scott Alexander got his hands on the logic of the superpowers and extended them to the end of the universe. Perhaps some of these characters should have considered their choices more carefully. My wife and I quote this one to each other: “But I didn’t mean to become the king of Saudi Arabia!”