You miss thing you cant get, when it comes to food.
Salt and Vinegar crisps were like gold dust in the Expat community in Korea.
Branston pickle was another. Cheese was expensive and not that good a good mature cheddar was like buying gold or something.
Missed bacon in America, Real bacon not that rubbish they call bacon that is not suitable for sandwiches and good chocolate, Hersheys is the food of the devil.
Pork & Beer when in the Middle East or some of the more muslim countries obviously (Saudi & Iraq). But in places like Indonesia and Dubai you just have to go the Haram section to buy your infidel food.
I didn't miss my family much day to day, skype/facetime calls home and a busy life,
BUT when my mother died while I was in Korea i have never felt as alone and as far away from my family and friends.
Ok it took me an extra day to get home, driving back up north in the UK compared to flying home from Korea but it was strange, sat on my 20th floor apartment looking out over the bright lights of Seoul at 4am wishing i wasn't there.
Its a shame now cause my 2 biggest memories of Korea are meeting my wife and hearing about my mothers death, kinda opposite extremes.