Could do with learning some more card games. I love that you can play so much without having to buy anything new with them.

This, however, is anathema to an industry which is why you get card games that are thinly papered-over traditional playing card games with relabelled cards and slightly-altered rules. (Think Uno: the commercial wrapper around Crazy Eights.)

There are hundreds—or even thousands—of traditional games out there, playable with simple, ubiquitous playing pieces (like poker decks, small coloured stones/markers/whatever, and simply drawn boards on paper). So if the industry collapses you can keep playing new(-to-you) games for the rest of your life without running out.