I can say that I found the idea of the finality of it all to be a little off putting. Once you drink it, that's it. No going back.
And as depressed as I am, it hit me that dying would mean I'll be giving up the opportunity of experiencing any more pleasure, and I mean that in a purely hedonistic sense. I know I won't exist anymore or be aware of anything, but in a way I am preemptively grieving the thought that I'm giving up the ability to ever get high again, or getting drunk, the feeling of being blissfully fucked up. Even when I'm depressed, opiates almost make it alright and I thought instead of dying, what if I just spent the rest of my time here fucked up. But that's just nostalgia. I also remember how shitty it is, running out of drugs, seeking out drugs, dealing with drug addicts, and police. There's a lot of downsides.
Never getting to listen to music again, or watch a good film, or going to the beach, never being able to see more of the world.