Tbh, I don’t had any cards like that personally. Sure, I love buying the same artwork in multiple languages for some of my collections, but I never liked having more than one copy of the exact same card. Every card I have more than one of goes into my duplicated stack to be sold. For Yu-Gi-Oh I had some cards quite a lot, like Monster Reborn or Mystical Space Typhoon, because I was playing the game and they were in all my decks. For Pokémon I never played the TCG, so never had any need for a playset or copies in multiple decks, and I never wanted more than one of the same card - not even my favorite artwork of all TCG cards (Moltres WotC #21 promo).
Also, I’m wondering what @RayquazaTCG would answer here. 
Greetz,
Quuador