I read the other holiday stories thread and all I could think about were these two stories...which I HATE:
O'Henry's "Gift of the Magi". Geesh people, communicate with each other much? What a sad tale of misbegotten relationship martyrdom. It bugs the crap outta me.
Hans Christian Anderson's "The Fir Tree." OMG what a sick story. Honestly though all of his stories make me want to vomit...but this one. BLUrgh.