Strange music indeed. One could easily call it Psychedelic Death Metal with some Doom or Autopsy on mushrooms. I think what one instantly understands by listening to Soulside Journey is that somewhere along the lines, Fenriz was extremely serious about WANTING to play simply, opposed to passing simple music off as art when its actually your limitation.
Starting with the last two demos before the full length ("Cromlech" and "Thulcandra"), moving foward with "Soulside Journey" and ending with a later release of "Goatlord," methinks that these efforts are aborted gems that aren't revisited (probably by the band too...) frequently.
They can can proggy at times, but altogether they refuse to be forgotten, since I know a lot of people who will say "Goatlord is actually my favorite Darkthrone 'album'".
I THINK there might be an aversion to this era of Darkthrone (or should I say Dark Throne - to denote the Death Metal era?) on the ANUS forums, but I'm not sure. Any thoughts?