What are the best short stories?

Recently there was a great thread on Quora where participants shared their own short stories, some short and with an unexpected twist, and some short stories from well known authors.

Here is some of what was suggested:

• All You Zombies -by Robert Heinlein
• Suit Up - Nikant Vohra
• The Elephant Vanishes and Blind Willow, Sleeping Woman - Haruki Murakami
• Gift of the Magi - O'Henry
• A Small Good Thing - Raymond Carver
• The Third and Final Continent - Jhumpa Lahiri
• Impact of job change - Dinesh Enid
• Flowers for Algernon - Daniel Keyes
• The Last Leaf - O. Henry
• The Swimmer - John Cheever
• Goodbye, My Brother - John Cheever
• Pet Milk - Stuart Dybek
• Victory Lap - George Saunders
• The Word - Vladimir Nabokov
• Notes to My Biographer and War's End - Adam Haslett
• The Things They Carried - Tim O'Brien
• The School - Donald Barthelme
• An Occurrence at Owl Creek Bridge - Ambrose Bierce
• The Diamond as Big as the Ritz - F. Scott Fitzgerald
• The Ice Palace - F. Scott Fitzgerald
• Dice, Brassknuckles, & Guitar - F. Scott Fitzgerald
• The Nick Adams Stories - Hemingway
• Good Old Neon - David Foster Wallace
• A Good Man is Hard to Find - Flannery O'Connor
• The Lottery - Shirley Jackson
• There Will Come Soft Rains - Arsène Hodali
• The Fall of the House of Usher  - Edgar Allen Poe
• The Birthmark  - Nathaniel Hawthorne
• The Metamorphosis  - Franz Kafka
• The Egg - Andy Weir (this also had a short video adaptation)