I just beat the game tonight (er, this morning). Some random thoughts:
ball and chain = best new Zelda item ever!!
magic armor (tied with the cave of ordeals prize) = biggest dissapointment ]:<
final Ganon fight = best boss (even though it was really easy, I was so happy that it was a no-nonsense 1 on 1 sword fight rather than some stupid gimmick)
I had no problem with needing 5 heart pieces to complete a new heart. I always like finding heart pieces. I hate how many chests have rupees in them. I'd be wandering around, find a hidden chest and then, what? Oh goodie, more money! But your giant wallet's still full 'cause there's nothing to spend any more rupees on! Better put it back for now lol!
I'd like to keep playing, but I'm not sure that there's anything left to do that's actually interesting (trying to land on a tiny, moving platform while floating through the air with a chicken in hand with a camera that WON'T LET ME LOOK DOWN just to get a heart piece isn't exactly my idea of fun). Oh well. I thought nearly all of the dungeons were quite thoroughly excellent while they lasted.
Btw, seeing Colin with a sword and shield during the ending credits made me wish Nintendo'd make a TP spinoff starring Colin as a spiritual successor to Majora's Mask.