My family are all well aware that I think cards are a waste of money, but I do send a few out to my grandparents and aunts/uncles because it is pretty much my only contact with them all year, so I send a card and a letter. I probably send 5 cards a year and receive less than that. I appreciate any contact from people but would much rather an e-mail that has saved paper, or a phone call which is much more personal imho.