Lets break this down

OOT: The treasure chest game. Now I know that you can win with the lense of truth, and I've done that before many times. However, one day I felt like actually playing the game the way you are supposed to. 23 tries later, I won my prize.

MM: That stupid break the pots in one throw game. I must have blown 200 rupees on that game.

WW: The letter toss game. This is what kept me playing long after I beat Ganondorf.

TP: The second Star Game. I was only able to beat it once, and I'm convined that it was by luck.

LA: The claw grabbing minigame. I spent tons of rupees on it before I relized the secret: Place the claw in the top right corner of the rectangle and hit the button as soon as whatever you want hits the bottom left corner.

The other games don't really have hard minigames.

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