What is that blog about?

In this blog I will not elaborate on the topic of bands such as Metallica, Megadeth, Manowar or Guns n 'Roses - (because it does not make sense when these bands are appearing on almost every blogs), but on the little-known, which did not have gained so great fame as the above, but still are worth noting. I'll take a closer look at each subspecies, ranging from folk, psychedelic and instrumental rock / metal, and ending with the avant-garde, experimental bands.