I love how Metallica uses a nice smooth acoustic sound in the beginning of alot of their songs and then transitions smoothly into a more heavy metal sound its great. What is so great about that is because it shows that there is meaning to their song. As a matter of fact I'm listening to the Death Magnetic Album right now. Another thing I like about Metallica is that he James Hetfield is always talking about real stuff. Stuff about life and that is how I feel. Easy way to express emotions. I love it.