"Being as energy cannot be created nor destroyed, what about conscious energy?"

This displays a misunderstanding of Science, a layman's mungling of terms that have precise meanings in Science and often are assigned various sorts of semantic gibberish by the scientifically untrained.

"energy cannot be created nor destroyed" - it however can be converted endlessly from one manifestation to another.

"what about conscious energy" - there is no such thing! (manifestion of energy) as "conscious energy". There is something scientifically vague we call (a state of) 'consciousness', which is the observed emergent result of complex electrical currents in the neurons. When that current flow stops, so does the consciousness -> oblivion.

The 'energy' doesn't 'go anywhere', because what happens is that the source of the energy (chemical reactions) just stops when the organism ceases to function ...


"Is yours an unattached island, in a sea of nothing"

This reminds me of a Star Trek episode plot .... a nice piece of entertaining fiction (and may even provide some warm comfy feelings to many), but has no basis in currently known scientific fact...

... a nice touchy feelie idea that "one's consciousness (you mean some sort of Alien Energy Field, Spock?) merges with all the other ones floating around in empty space"

... Beam me up Scotty!