Every year since I've been out of college, I've sent a photo Christmas card. First it was me and my cat, then when dh and I became an item (the year before we got married) it was him and me and my cat, every year until we had dd. Dd was born at the end of October and that year I sent out a card with a picture of just her (taken on Thanksgiving in a Christmas dress), with her full name, birthdate, and weight. The next three years I sent cards with all four of us. This year I am planning on sending a Christmas card with both children, including the baby's full name, birthdate, and weight. Which is just as well since my cat died
and then starting next year I will start sending cards with dh, me, and both children.
I usually pick the picture first, then try layouts on Snapfish, Shutterfly, and Kodak Gallery, find my favorites, then price them. I seem to remember I went with Shutterfly last year because I liked it better and with a coupon it was only like $5 more expensive than Snapfish. But it just depends on the year. I always go with the 4x8 size (I think) and a single photo. It seems simpler that way.