I dont think that ive ever 100% a zelda game, but i plan to with ocarina of time, minish cap, and links awakening...i just dont have the pationce to go through a game to 100% it
I play to beat the game, and have fun along the way. Then later I try to get all the heart containers, but I can never complete giant side quests like the gold Skulltulas in Ocarina of Time, or the Poes in Twilight Princess
I always try to 100% each game but sometimes if getting that last secret or heartpiece becomes too menial, like fishing to get the gold scale in Oot for example, I will be satisfied with 98.7% complete
What I do primarily is that I would play the game first to just beat it and then after I beat it I would go back and find areas that I missed and find heart pieces and other stuff to complete it 100%.
As of right now though whenever I play ALttP from the start I complete it 100% before I beat it just because I know where everything is at.