This is a slightly different kind of swap - it's a Pick-a-Theme swap, which means that each player chooses their own theme and the others make cards specifically for them (rather than a general theme). I joined this swap in two different groups - one group of people asking for Altered Playing cards (people request a specific suit and number, in order to build up a deck), and one for regular cards. The themes above were vintage woman or girl; woman on a postage stamp; American robin; Fish. The cards I get back will all feature a postage stamp somewhere on the card.
And for this group, the themes were seahorses, jellyfish, snails in sunflowers (this card is sideways!) and shabby chic. And the cards I get back will all feature a black bird.