(Original post by JustCharley)
When you are dreaming, you don't identify what you are perceiving as just subconscious thoughts. This is because dreaming has the same phenomenological effects on our experience or perception, as external reality does. So you could argue, that when we are dreaming we value it just as much as our perception of external reality, because you can't tell the difference until you wake up. I know that some people sometimes always dream with a certain decorative border around their frame of perception, or you never are actually yourself but witness your dream self doing stuff, but from a philosophical point of view, the qualia, or what-it-is-like-to-be bit to everything, is the same in dreams as it is when you are awake.
I think that most philosophers would argue that it is wrong for people to completely dismiss their experiences in dreams as not as valuable as the experiences we have in the external reality, but stepping away from the nitty gritty super logical world of philosophy, the lack of empirical third person perspective in dreams compared to that of our experiences in the social external world, renders dreams less significant on a practical level.
Death is a funny area, because we can't step out of deathly experiences to step back into this current life, like we step in and out of dreams, so the closest you'll ever get to assessing the value of the "death experience" would be to talk to people who have had NDEs. And for most of those people, NDEs have profound and incredibly significant effects on how they live the rest of this current life.