So I'm 7 hours in, thought I might post my impressions.
Back in 1998, when OoT first came out, everyone I knew who played it were telling me this game was like the second coming, that it was gorgeous, the music was awesome, etc etc.
I wasn't into Zelda like I am nowadays, I liked Link's Awakening and LttP without finishing it, and I thought the game was a bit too hard sometimes (Zelda NES : never forget), and that I would suck badly at a 3D Zelda game.
The first time I really played OoT was after Majora's Mask and Wind Waker, and I really didn't like it for technical reasons first : the game felt blocky and dated (especially after MM and duh, WW).
Now I am playing it on 3DS, and this game blows my mind. I mean it's basically the same game with just a basic graphic overhaul (towns and stores are now fully rendered in 3D, like in MM as at the time), but the core of the game is the same, and I can't believe it was made almost 14 years ago, it feels like the game was way too ambitious for its time, and that it succeded on the N64's limited hardware. I mean, it's really different from Skyward Sword (which is my favourite 3D Zelda where the game is basically one giant dungeon with little exploration and more riddles), but in OoT the music, the overworld, the feeling you get when you discover some things and it greatly rewards you, the NPCs...also you are enough left alone to figure out what to do, but if you can't continue there are always hints and help to help get you through.
So well, I know understands OoT's greatness.