Mine is probably the most expensive item I have. Which is the PSA 9 1st Edition Base Set Charizard! WOOHOO! But I do have lots more cards I like, just that the value is not as high as 1st ed Charizard of course...
Mine are the Pokemon Creator cards that I remember getting a long time ago. I was so excited because they sent you a pack of all the cards and a note saying congrats you were chosen as a winner. My sister and I both had entered the contest and it was so funny when I got a pack of the cards in the mail and she didn't. Hehe