Holy crap, I played it so much when I was little, and I was stuck when Link was a little kid and he was in the giant whale while trying to get the third stone, and I couldn't beat it until I tried it again six years after the first time. I still haven't gotten to a single temple yet, but that's because the only copy of the game (and the only N64 I have access to) is at my grandmother's house, where I'm almost always busy with family stuff :P
Edit: Talking about Ocarina of Time, I mean