I have to go with Ocarina of Time. Nothing wrong with Majora's Mask, it was a brilliant game. But OoT was just so much bigger and wide open a world. Oot was all at once a complete change to everything Zelda was and yet every single bit the game Zelda had always been. Majora's Mask was just the really impressive DLC sized sequel to a truly great full game. Too many people make too much of the time mechanic. It added nor subtracted anything to the game, it was just an out of gameplay framing device. I only once had time run out... I did it on purpose close to the end because it had never even come close to happening yet and I wanted to see the cutscene. The Killer Bee's "helper" quests never felt necessary, and were just shoehorned in to further emphasize the "time" framing device (as if 95% of the game already wasn't screaming "look at the time parts, this is new and different woohoo time mechanic" like a kid on a diving board. Yeah, the time mechanic was a neat story device (if not anything that had any influence on the game) but as I said at the time, I wish they had made a whole Zelda game out of it.