This review may contain spoilers, click to view
Okay so you want to know why I didn't like Deer Hunter, huh? Where do I start? I think that the movie is generally overrated with the exception of the acting, which was exemplary. The first thing is that there was a lot of wasted time in the wedding scene without actually adding to the story or the characters.
Second, the characters themselves were never developed worth a hill of beans. Time wasted in the wedding scene could have been put into actually showing a bit more of what made Walken's character snap. All of a sudden he flips out at the game and is convinced that he should start playing all the time? That's the last thing you'd expect to happen. Why didn't he just run away?
Now on to De Niro's character. The name of the movie is Deer Hunter and there's a good scene of the friends hunting before going off to war that supposed to signify normalcy and their friendship, espcially Walken's character and De Niro's. But you never find out what the actual hunt means to De Niro. It clearly is one of the major things that defines him, both to himself and to those around him, but you never find out what it means to him. Also, what was his motivation for going back to get Walken? You never see the moment when he switches from being interested in Streep's character to feeling that he needs to bring Walken home. He just goes and it makes no sense. And why do they let him go?! And with an escort?! While the embassy is being stormed?! Was Walken really that important a person? He stayed behind in Saigon for cripes sake!
I understand that this movie was notable because it was really the first movie to capture what people felt about Vietnam and the emotions associated with people coming home. But, there's many better movies about the war that have been made since then. Platoon does a far better job of capturing what people go through in the pain of that war and Deliverance will better show you how friendships hold up under stress.
Anyway, that's the end of my rant. If you're a huge fan of Deer Hunter, I'm sorry but it just didn't do it for me... and you're wrong! :) That's why these are opinions. In my opinion, skip this movie.