My guess is Triple Triad will win because I see more comments about it and I never even followed that board. That's what my perception tells me anyway.
But I vastly prefer Blitzball. Best mini game ever in my opinion and it could be its own game. Not so different from any other sports game. Never understood the love for Triple Triad but I've never been one that greatly enjoys cards and such. Fun every once in awhile is the extent of it.