Great post Steve.
I like the oddities as they are (mostly) unique and that, to me, makes them extra cool to collect. Owning a card from a print test sheet is more interesting than a common that survived in high grade. Personal preference.
As well the print marks, factory #s, double names, ghosts, plate scratches all slight clues left behind. Another side to collecting, trying to solve a 6000 piece 100 year old puzzle with no reference image to go off of
