What makes this movie stand out is that the host/interviewer, Sam Dunn, is not only a lifelong metalhead, but also a trained anthropologist who had just finished his Masters Degree. This adds an extra level to his research and the ability to analyze each of the separate movements from a sociological perspective. What's great about this is an ability to look at the environments the musicians came from as well as show how their music affects their audience. There is quite a bit of discussion of why we choose to listen to heavy music and identify with the subculture. This level of study legitimized his work while he takes time from the beginning to prove his fan status as well, which is just as important.
The centerpiece of the film is a diagram that Dunn uses to establish subgenres starting from classic rock to Norwegian Death Metal. This grid helps to categorize key bands and see what led to them and what they eventually caused. Pretty cool work in my opinion.
What I really loved was seeing our fearless filmmakers interview some of metal's biggest icons. You feel like we all got together and picked the smartest fan and decided he should be our spokesperson. Watching him talk to Dio, Toni Iommi and Alice Cooper, just to name a few, you can just imagine how amazing it must have felt to sit down with these true legends.
The fact that the documentary is an oral history by the right people (because of how serious and important they treat the subject) makes me happy that this film exists. Knowing how many of the musicians interviewed aren't with us anymore makes me proud of them for making this film at the right time and so well. It does a great job of justifying what most of us already know, which is that heavy metal is more than a fad or musical trend that will disappear when it is no longer popular. Like horror films, metal may wax and wane in the public eye, but the die hard fans are forever.
I highly recommend the bonus footage and interviews on the special edition. The highlight is an extended version of the section dealing with Norwegian Death Metal and the rash of church burnings that surrounded its origins. Considering this is a branch of metal music that I have only a little knowledge of since I have no interest in it musically, I learned quite a bit from this more in depth look.
In the end I would highly recommend Metal: A Headbanger's Journey to all fans of music in general, but especially metal. You might even learn something while you bang your head along to the soundtrack.

