Gwent is by far the game with the most like, strategy and depth too it. Its also the most easy to get into, in that you don't have to jump through a million hoops and etc, you just play.

Its got some obviously broken 'way better then anyone else" strategies, and could do with some refining but, with that they could totally sell it as a CCG and I could get my friends to play it with me no issue. Easy to teach, harder to master.

Triple Triad on the other hand is either completely random..or totally one sided. Decks either are 'broken" or "terrible" with little in the way of a meta-game beyond "Do you have the S-tier cards? No? ok you might just lose to one, nothing for it. Gwent on the other hand, you can have a competitive deck made up by about 10 battles in.

So, yah, maybe its also cause I think FF8 sucks, and did back when it was new, but my vote is absolutely in favor of Gwent for the reasons stated. Its not even close.

Triple Triad is the only mini game I've ever seen that can viably replace combat as the central way of growing characters. If you play enough Triple Triad and know what you're doing, you can completely break FFVIII before you even fight the first boss. Now that's a well integrated mini game! As a competitive game, it's horribly imbalanced; but, as a puzzle for the player, it's very fun.