Legend of Zelda: Skyward Sword [SPOILERS]

 Spoiler

Just beat the game. It was decent but I still prefer MM, TP and WW over it. Haven't finished all the side quests but they weren't that interesting from what I've done so far. Hate the fact that you've to wait so long sometimes for certain things, I mean when you're playing the game yourself you could know I don't want to hear Fi babbling on forever or continously having it shown I found some random treasure. What's up with having 50 useless amber relics anyway <.< Felt that the bosses were way too easy once you could see the weak spots with motion control, then again I did spend 20 minutes figuring out how to kill that damn skultula and wasn't able to figure out how to beat the laser owls at first. Threw like 5 bombs at them before figuring out it wasn't working so I just evaded them before I actually had to kill one.

Only interesting character was Ghirahim for me, Demise was a bit too 'playing by the rules'. End boss battle was over too quickly. I expected way more. Haven't used a single bottle aside from fairy capturing, water dropping or my shield for that matter. Evading backward was way more efficient almost everytime. Can anyone explain to me what hero mode is exactly? They just offered me it and it seems like I've to replay the game. Is there any additional scene or bonus or added difficulty involved in this?