So I'm planning my personal Christmas cards for this year. I was originally going to try to have them 4-color printed and sell the extras, but I don't really have the money for that.
I also had considered printing postcards for my own list, but I don't have 200 people to send it to, and I'd like to do Christmas letter. That said, the postcard idea is the cheapest to both print and mail, and it's unique (how many christmas postcards did you get last year???) I also have the acrylics and paper to paint an original piece, scan, and create the card in Photoshop.
Of course, I could always do the postcard as a novelty to anyone who I've got an address for, and the letter separately to close friends.
Then again, I also like the idea of a gift book card . . . a handmade card with red stock that wraps around and is tied with a bow, with a story and misc. tidbits inside. They'd be more time-consuming, and not cheap to make, but, in the end, would be a tres elegant item!