In reply to nathan79:
I still send about 50, as a way of keeping in touch with people I don't otherwise see (or finding out if some 'ancient' contacts are still alive!). And seem to get quite a few back on the same basis, which is nice (pace, the argument that if you don't otherwise see them, why bother etc). I design my own using Vistaprint and use a photo of something that been a highlight my year*, and print a few lines of news on the bottom. I also hand-write something personal of relevance on each card. I print address labels. The pre-printing takes the drudgery out of the Xmas card rod-for-our-own-backs each year, and I'm excited about writing a little bit to each individual. I am also converting quite a few to e-mail equivalents (esp the international contacts). E-mail also means I can send the e-mail on about 23rd Dec (in time for arrive for Christmas) rather than a month earlier to be in line with Royal Mail "you will post your Xmas card before this date or we won't deliver them in time". I don't send Round Robins and I used to dislike getting them, but some of them are now such a parody (without realising) that it does make me laugh!
*: After about 10 years of doing my own photo, I have discovered quite a few people are quite interested to see what photo is on front of my card each year!
It's the same with postcards: when (if / if ever again) I travel abroad, I do send postcards (if I can find any to purchase, which is increasingly rare!). I quite like getting unexpected postcards from unusal places round the world, so to do that, I reckon I need to send a few (also take pre-printed address labels which makes like easier, and posted when back in the UK cos it's quicker than the typical 3 weeks it takes a postcard to get back to the UK from a small island).