My favorites from the Met Museums's catalog:
The colorful, free illustrations by Andy Warhol (he's more than soup cans!), the elegant ornamentation of Aubrey Beardsley's angels, and the adorable partridge by Eyvind Earle.
I won't be buying traditional cards this year because I'll be doing photo cards but if I were to buy some they might look like these. And I am very inspired by those angels. One of these days I am going to get back to doing some linocutting and that style seems to lend itself to that medium.