For vocabulary, one side the word in kanji, the other side the hiragana and the definition.
For kanji one side the kanji with stroke order and the other side the reading and definition.
I feel that it was worth it for me to create them. Once I wrote the LaTeX formatting code, I wrote a simple code that populated the cards straight from Wanikani. At least a few people actually printed them all out and cut them up. I still use them for fun practice occasionally.
I am working on cards for 力士 names which I will post shortly.
@anon64274572 here are my Sumo cards.
You need to hit the download button at github. You can see the code that I used to create them as well. Let me know if it dosn’t work, because I have never used GitHub before. I may post my vocabulary cards there if this works.