The one thing I loved about that game (aside from mommy-aura sensei) was how you could just play cards anywhere:
Some guy: "The world is in danger! If we don't get over there now..."
Squall: "I challenge you to Triple Triad."
Guy: "But, but the safety of the world is..."
Squall: "Decks out, coward!"
Only way to make it better is to let me challenge enemies mid-battle.
Also, this is the only FF I ever wanted a sequel to, but I want it to be mostly TT.
You should be aware of several things from FF1 (largest amount of allusions of any game), FF4, FF6, and FF7 to get some of the bigger references. The other games pre-FF9 also help to further get all the little references.