Death fascinates me lately (ok not just lately), which is not good, probably.
I'm either worrying that I might have some serious illness or I'm thinking about wanting to die.

I see death as clarity, relief, probably the moment of realisation of "how everything is so beautiful I just hadn't let myself see it". I see also death as being absorbed into everything, into the "all that is", like in the film, Lucy, where she becomes part of everything after she dies.

Maybe death is the realisation that there is no death really, only the ego dies, or, as spiritual teachers say, our association with the ego dies. Something we cannot grasp until then, like we live in a box and trying to describe the box from the outside and having debates about that but we have no chance of getting out of the box, ever.
But all these are just the perspective of the one in the box.

Near death experiences are also interesting, but being so subjective, it's maybe just the subjective experience of the individual, or even a collective experience, but still maybe irrelevant as the actual death is concerned, because, again, it's a perspective from "inside the box".
All of these are perspectives of the living. I don't know.

Maybe it would help to get more familiar with this whole idea of death in our culture, because we are terrified by it, as it is such a taboo. I'm thinking now of people who know they will die in a short time and start doing things they really wanted to do. But myself, for example, am so terrified of death that I'm procrastinating on living. I can't really explain this.