It'll definitely last longer than my game, which still went on for a good two years and more (in English-- the Japanese version I assume was older than that), so try not to worry about it so much! I will hope so for your sake, too!

PROUD OF YESELF, YES! And ah yes, the self-fulfilling prophecy: your favorite deck is your best because you put the most work into it :D

I do love card games, so it's definitely at the top of the list :D