Although a set collector I would love to get ahold of a Joe Schlabotnic card
. I have seen some fantastic cards in his name, usually with his face obscured by some embarrassing event.
I do know people who collected all cards presented in the Flipping Book. Would guess there are some Cub fans who collect all Cub players, either pre war, post war or both. Frankhardy who posts here sometimes has a thread on CU in which he has posted a Cardinal collection that includes at least all post war Topps cards, including insert, oddball and test sets