At christmas, we out at the FOB were "donating" junkfood to the ANA/camp security guys by the triwall. Everywhere you looked were shoeboxes full of candy, and stacks of "any Canadian soldier" letters that people refused to open, for the feeling that if they opened it, they'd feel guilty for not writing back. I don't know how many toothbrushes, pens, notepads, etc, that got thrown out (although as a supply tech, I did occasionaly top up my stores with them).
Most unappreciated thing: Candy. Seriously, I referred to the FOB as candy mountain. We've got more than enough of that stuff.
Most appreciated thing: The hilarious drawings and letters from the kids, the christmas tree/decorations I received, small time-passing books, my favourite of which was a book of Winston Churchill quotes.