I always take a step back and try to evaluate the music when someone else with a completely different musical history (especially my wife) views it in a way that is totally contradictory to how I feel about it. She is blown away by how evil and murky the dark ambient can sound. I remember her funny reaction to Possible Planet by Roach, and how she commented that this music would screw people's minds up. I thought about it, and really considered it, and came to the conclusion that for me, the opposite was true. I find it quite cathartic. If I am in a depressed mood, some good dark ambient, something like Nebula's "Genesis", takes me to deep reaches of the mind, and puts everything into proper perspective. I think it has a mellowing and grounding effect. But then again, I consider "Possible Planet" and "Genesis" as well as Inade or the CMI stuff to be dark ambient, so my definitions of what I'm listening to may be skewed...
But there doesn't seem to be another category name for different ranges of dark ambient. I think it's ok that way, as a genre should have a wide net in which to play. I like the permutations. An album like "Stalker" could be seen a scary in many parts, and could amp up one's paranoia if one were in the wrong mood, but I think it leads to a cathartic space, it lets us out. I think the best stuff does this, creates a balance. After all, in the deepest reaches of the mind, soul, space, the world, whatever, there are no value judgements in terms of what the human mind can grasp. I think "Magnificent Void" tries to strive for that balance. How can man express the furthest reaches, the void, in art?