LttP is pretty damn good, but for some reason I'm drawn toward Link's Awakening more.
Link to the Past! Hands down! Not only is it the best Zelda game, it's also one if the best games ever.
I would've said wind waker, but recently playing through it again on the wii u, I have some complaints to say the least haha. I think Ocarina of Time or A link to the past are both still fantastic to play through especially the 3d OOT