Still doing research on the categories, but was unable to find a category for "greeting cards" . I was able to find postcard greeting cards or items related to stamp collecting. I've included a scan of an example, which is older multi-page Hallmark birthday card for a dad. Typically most of these consist of a single sheet of thick carded paper which has been folded to form 4 pages (i.e., not postcards). One of the most popular brands collected (in the U.S. at least) is Hallmark. If future traffic warrants this category could be broken down into various subcategories such as Christmas, birthday, wedding, valentine, etc...

I am curious if the form used for submitting category suggestions could include the ability to submit a sample image to show exactly what type of item you want the category to be about? Currently the only way to do this is to make a post here with a image and then include a forum link to your post in the category suggestion form?