I just found out that my publisher received a fan letter for me, and is forwarding it. I LOVE that! I get reader letters through email and FB all the time, and I love them, they feel so good! I cherish them all. But getting an actual paper letter in a time when not many people write letters that way any more feels...pretty cool. They took time to write it.
Do you write letters (on paper) still? I do, occasionally, especially when packaged with something else like a copy of my book (though then it's usually a short note), or a gift.