I hit my category limits a while back and there are a bunch of singles that I can't list because of it. If we had the option to just list for example; All magic singles under 1 category, All yugioh singles under 1 category etc or whatever we would like that would allow us to put more items on ebay, at least for myself. I really don't think that customers on ebay are clicking on the individual categorys on the left side when in our ebay store, considering most of our ebay orders are for 5 or less cards. I'm pretty sure most customers do a direct search instead of browsing by clicking on the sets so it seems kind of null to have the categorys since the title has set name anyways. Just a thought
I called ebay and pleaded and begged - 5 calls later I have 6000 categories :)