I really like the ending of Flying Daggers, though I am increasingly aware that I'm one of the only people in the world who does.
I also like Iron Monkey; it's actually on my "to buy" list, which isn't very large. It's so far removed from the others we're discussing as to be in a different genre, but I thought it was fun.
I, too, love "House of Flying Daggers," but I have to admit certain faults. I actually enjoyed it more than "Hero."
And I have to agree that "Iron Monkey" is really not the same genre, but it was merketed as such, and therefore I felt it worth mentioning, plus I wanted the excuse to talk about how much I HATED HATED HATED HATED HATED IT!!!
Actually, you hit on part on why I hated it so much - I went expected something more in the genre we are talking about. Even then, when I realized that it was more of "Zorro" or Super Hero type of thing, I tried to go with it, but the writing and acting were just beyond awful, and it was not well directed at all.
"The Promise" in some ways is a different genre as well, but they are all marketed the same in America.