giselle, your statement of the interchangeability of many potter's works is the exact reason i will not buy or use any of the many "texture" mats, rollers etc that are sold everywhere to potters. not those, but if i see something from another source, like the maple leaf placemats with oval holes in them, that is fair game.
this year i found 4 or 5 items that i have rolled into clay and turned into trays or tiny dishes. only someone with an imagination can see that their origin is the reverse of the placemat and only then if the placemat is something they have seen.
it is much more fun to find items you might never associate with clay and exploit the variety available.
I just rolled dogwood branches into some clay yesterday!