On the topic of metal, the argument that thrash is just noise is somewhat valid. Constructed and organized noise but lets not pretend there’s deep meaning or composition.
But not all metal is like that. If you need an example of metal with meaning and a good sense of music and melody, this should do. Its not noisy or obnoxious at all. http://youtu.be/XTUvYutNkFg
I do think it would be better with regular pop rock singing though, but even If you don’t like it (which I would understand) it’s pretty hard to deny that at least the instrumental side is well-done.