I agree with points that everyone has made. Let's make it even simpler. If it can:

1. Fit in a binder (i.e. regular cards, 4x6 - 8x10s, coins, etc) and
2. Issued/printed by a legit card company

then it should be on the main list. Everything else constitutes as memorabilia and should be relegated to the "Miscellaneous" list. I hate to not have the Pinnacle cans, Donruss Tin Packs & Boxes, etc. on the main list, but we have to draw the line somewhere.