I miss my friends and family - that's when I'm away from Russia - like always...
I miss my husband and kids - that's when I'm traveling now and away from my new home country (second motherland )
Food - no - every country has great food if your mind is open
Customs - may be. But just some of them - like coming to your brother's house without calling - just out of a blue - without setting a date and time for dinner two weeks ahead
And New Year celebration "Russian style"! With Ded Moroz, Snegurochka, huge bag of gifts, lots of drunkards on the streets etc.