Just wanted to point out that playing with other brands of playing cards may change the pip layout (ATK / DEF) for some cards. This might change the way you play. Bought some cheap plastic cards that had the following
A = 0 ATK / 1 DEF
2 = 0 ATK / 2 DEF
3 = 1 ATK / 1 DEF
4 = 2 ATK / 0 DEF
5 = 2 ATK / 1 DEF
6 = 3 ATK / 0 DEF
7 = 3 ATK / 1 DEF
8 = 3 ATK / 2 DEF
9 = 3 ATK / 3 DEF