This makes me giggle.
Incidentally, I didn't see Flying Daggers, but I had no problem at all with the suspension of disbelief in Hero. But then, I read Hulk comics.
I love the Hulk, and I loved "Hero" - but deflecting all of those arrows with his sword? That takes some suspension of disblief. But suspension of disbelief is inherrent to many of the best action movies. I hate it when I go to see a Bond flick and someone near me complain because it's silly - what did you think you were watching?
"Daggers" is way over the top, but in a very fun way (I love the fact that an archer fires six arrows in quick succession, and the other five pause, in mid air, mind you, so they can all hit their prospective targets in perfect sync. That being said, I love that shot - "Daggers" is just amazing, action wise - for more impressive than "Hero," though "Hero" is more visually striking in terms of color an cinematography, and has a much better ending. Ultimately, I like both movies enough to own them.