This is an interesting infographic which falls into nice to know category. It is not compulsory to know the city nicknames. However being familiar with the nicknames and the stories behind them is a plus.
Btw, the nickname of my beloved hometown Jakarta is the Big Durian. Durian is South-East Asian notorious fruit wrapped in a thorn-covered husk, spreads a poignant smell (like a rotten Brie according to Anthony Bourdain) but contains creamy fruit flesh. Jakarta bears figuratively ressemblance with durian. It can be hard and thorny for newcomers but is sweet and scrumptious to those who survive it there.
Do you know another city nicknames? Please do share it with me.
Source: Just the flight