Almost all Heart Containers, over half of the Skutulla's and almost all items.
So about 70-85% complete.
I loved collecting the masks and talking to people the most. xD
//shot
I have 100% in everything. I have all golden skulltullas, every single item, and I opened every single chest possible in both the normal and master quests of Ocarina of Time. All I'm aiming for is to get a perfect score on horseback archery on master quest. Only 10 points away! XD