Awful! That's experimenting on a person against their will, and without their knowledge, even! I sure hope people like you don't start freezing people like me in the event that I decide against cryo...

-shrug- so don't leave your brain to science. I figure if somebody is prepared to let their brain decompose on a table while first year medical students poke at it, you might as well try to save their life. Provided, of course, the laws wherever you are permit you to put the results down if they're horrible. Worst case, they're back where they started.

People experience this every day. It's called chemical depression. Even if you don't currently see a way for preservation or revival technology to cause this condition, it exists, it's possible that more than one mechanism may exist to trigger it, and that these technologies may have that as an accidental side-effect.

Chemical depression is not 'absolute misery.' Besides, we know how to treat that now. That we'll be able to bring you back, but unable to tweak your brain activity a little is not very credible. Worst case, once we have the scan, we can always put it back on ice for another decade or two until we can fix the problem.

Uh... no, because I'd be experiencing life, I would just be without what makes me me. That would be horror, not non-existence. So it is not death.

If I took a bunch of Drexler-class nanotech, took your brain, and restructured its material to be a perfect replica of my brain, that would be murder. You would cease to exist. The person living in your head would be me, not you. If brain damage is adequately severe, then you don't exist any more. The 'thing that makes you you' is necessary to 'do the experiencing.'