So my informal experiment yielded some interesting results. I had too much going on in real life to keep my internet promotion up so, needless to say, my valentines didn't sell. However, here's the views results - for one set of cards there was no difference in whether they were in the top category of paper or holidays. For the other set there was a significant difference with the holiday top category being higher. So I've decided it's definitely worth using the top category of holidays if your item fits but definitely be sure to put one in the regular spot too!
Here's my newest listing from what I call my 'kindergarden flower' series! Enjoy!!