[h2oya311]

Big three turn-offs:

(1) Dislike writing on the front of a card (unless its a pre-war Postcard)...I particularly dislike pencil writing (or erasures).
(2) creases or paper loss on the face of the player
(3) 80/20 centering or worse...yuck!

Otherwise, just about anything goes. Creases, soft corners, paper loss, trimming, tears, pinholes, writing on the back, hole-punches, etc.

I've noticed that hole-punched items get significantly discounted in price vs. other flaws. I've never really understood that.

That said, the majority of my cards are scarce or expensive, so flaws are okay by me...but I'll think twice if they exhibit any of the "big 3" flaws I listed above.