From the comment by TheCongressGuy on this reddit thread: https://www.reddit.com/r/playingcards/comments/1hz1184

Would like to see the following fields added to decks:

* Name of Back Design

* Date Code

* Barcode

* Joker (and count)

* Extra/Ad Card

* Box Condition (would be unique to each user)

* Deck Condition (would be unique to each user)