DOOM METAL Basic playlist

This is a basic playlist covering all the various sub-genres of Doom Metal in no order of importance. What I tried to achieve is a collection of songs representative of each and all the sub-genres of Doom Metal spawned between the 80's and the 90's. It's my personal point of view about this, so it's normal to disagree about the choice of the songs. Spreading this kind of music is the ultimate goal, no commercial purpose of any kind intended.