The purpose of combining anime with Metallica is because Metallica has excellent songs to make music videos for anime. One music video I want to put on this site is really good. The music video is about Gohan  and Cell in their first fight *Both From Dragonball Z* The song used for this music video is "No Leaf Clover" This song came out with Metallica's concert "S&M" This song is new and I think that it is very good. The music for it is good and so are the lyrics. Other anime may not look so well with Metallica as their music video. Depending how well your timing is and the video clips you use will determine the Excellency of your music video. You can put the worlds crapiest song in there and you could still have a great music video because of your timing. Anime music videos are all about the timing, not necessarily just the song. Anyway the main purpose to Metallime is the rhythm that flows through the music video. The feeling you get when you see it, the nervousness or the hyper feeling you get.