Thor's winged helmet is as much of the comic book version's gear as his mighty hammer is. What is the movie canon reason as to why the movie Thor forgoes wearing his trademark hat in battle?
Secretly I think I was the biggest advocate for not having the helmet. Secretly between me and whoever is watching [laughs]. It’s just incredibly uncomfortable. The amount of times it would fall off and the bridge would be smashing me in the nose, or the wings of the helmet in one of the fight scenes was getting clipped off… it was something we had to, I think [pushes aside gesture] for the moment anyway.
There are many reasons, the prop being one and emoting another.
Perhaps the important thing is to ask why do superheroes ALWAYS take their masks off these days? Because studios are paying actors crazy money, and they want those actors faces onscreen as much as possible so they can sell the movie and the actors want their face onscreen as much as possible too lest they be forgotten. How much of any movie with Iron Man are we seeing Stark? Most of it... Cap is without his mask 70% of the time, even Spiderman is constantly "revealing his secret identity" by taking it off...
Usually the reason for this is that actors want to be able to convey emotion easily. It's one of the primary reasons we didn't see a lot of really weird aliens in the Star Trek series as well.
its nothing to with the fact that he's "dreamy", as true as that may be. The truth is that every time he [Hemsworth] had to do a fight scene, the helmet would fall off and they would have to start again. So ultimately they thought that it would be easier to fight without the helmet, despite the fact that he looked badass with his helmet.
As dissapointed as I have been not seen one of my favs childhood heroes not match his comic book version on the silverscreen (to me the original Thor needed to be coveyed regardless of alternate versions from a more recent universe), the truth of the fact seems to portray a helmet as a difficult prop to be handled specially due to the intense battle scenes. A helmet would have had to be made of thin plastic, and somehow be stuck to Hemsworth's head, or wear a strap that's made dissapear with CGi technology. Another alternative could have been to use some light soft material that would have been molded to the actor's head an then shoot all battle scenes to then break it or cut it up. Difficult task. Still there would have been no match to see Thor with his helmet on at least in the battle sequences.