I didn't mind the six hearts. Getting used to the motion controls was already a challenge, and I almost died fighting the first enemies in the game. Plus, in Hero Mode, taking double damage would mean two hits and you're dead.
Heh, true. If they had done it with three hearts, enemies would probably take away one heart instead of two, so really you'd still have a chance to get hit three times before you die.There actually isn't much difference between the three hearts in other Zelda games and the six hearts in Skyward Sword. In the games where you started with three hearts, enemies at the beginning only did a half a heart of damage. In Skyward Sword, the starting enemies do a whole heart of damage. The only difference is visual, making it only look like you have more health.