Just to prove what I said below wasn't hogwash, here's an ATC I made for a Round Robin. Each fortnight one person is the recipient of ATCs in a theme she has chosen, sent to her by the other swap players. This is the first ATC I made for this RR and it's for Erica in NSW, her theme was Seaside/Beach. I don't know Erica at all, nor her style. I just hope she'll like this!