Loved the treasure chest design in Wind Waker also....It was pretty badass....but....the treasure chests in ALttP are my favourites because the first couple times through the game you go through so much hell that every time you reach a treasure chest, it is the most REWARDING feeling ever....especially the huge chests in which you need the boss key to open
My favourute treasuse chests where from LttP and OoT.
Really like the boss treasure chests as they where mainly gold. gold.
And of course the treasure chests in LttP.
Definitely the Big Key's chest from Twilight Princess. And even more so the Big Key. (Feels weird calling it the Big Key for me, as the N64 games were my first ones, in which it was called the Boss Key.)
The Big Key chests from TP were great, so were the dungeon item chests from ST, so white and gold and stuff <) The spiky chests were awesome in WW, and the chests in OOT were great too. (especially when you were child link and had to halfway climb in to get items xD) They all gave the feel of being a pirate somehow...(?)