Well...yes !
I just uploaded various cards for Jewish Holidays (Sukkot,Shavuot,Tu B'shvat,Rosh hashanah and Simhat Torah). NOT the easiest Holidays I must admit, but they were still empty and I like a challenge.
So I actively create designs for those difficult categories.
For myself I rarely use the same card design twice. I just don't like to see the same image pop up everywhere, but that is my personal choice.
But it is addictive. I even look at other cards for inspiration when we go shopping
Corrie
http://www.greetingcarduniverse.com/corrieweb