I watched Troy last night.
From my very, very limited knowledge, I always think that women and goddesses play an important part in Greek mythology. But that is not the case in this movie. The supposed-to-be-the-most-beautiful Helen of Troy was played by Diane Kruger whom I have never heard of (and it is not surprising after I checked her filmography). To say the least, it is not convincing to me that a war would be fought for this lady.
The apparently weak female cast is compensated by a line of famous actors: Brad Pitt, Peter O’Toole and Orlando Bloom (who will be an archer, forever 
). My most favourite one is Eric Bana who played Hector, the elder Prince of Troy (perhaps due to the fact that Hector is the only sane and reasonable person in this story).
The battle scenes are overwhelming in Troy, especially when I saw the Greek fleet. The final fight between Archilles and Hector is great. By the way, was it common for Hollywood movies to add the sound effect of a humming sword? Or they started to do it after Crouching Tiger, Hidden Dragon?
I enjoyed watching Troy because of the action and drama. Although there were some minor lapses that affected the story as a whole. The male actors were great led by Brad Pitt. Like you i was also impressed with how Eric Bana portrayed his role.