Ocarina of Time is just one of those games, I'm not really a Zelda superfan I really only loved OOT and Majora's Mask. I think they're perfect games, I had to of went through Ocarina of Time at least 7 times. The atmosphere, the music, the dungeons are so good and it's always a blast.
I'm the same way with Mega Man games. Those to me have infinite replayability.