We once discussed thoughts of returning to the soil, going to scientific research and freezing.

Well if the idea that there is only nothing when you die bothers you, try focusing more on being present with the people in your life that really matter. Build experiences and relationships, so that one day when you stand before the void. You may look back and say my existence had meaning.

I don't believe you come back as something else per se, or in this personal energy you mention. When I die, the collection of molecules that make up my body will be redistributed. The energy impulses generated by the chemical reactions in my cells will dissipate into the universe. Their contributions to the universe will be far less than a molecule of water would make to all of earth's oceans.
My concern isn't what happens after I die, but what I can do to improve life while I am still around. As far as the effect dying will have on me personally, I don't think I will be any different than I was a century before I was born.

I ponder this as well. Admittedly, I'm not comfortable with the concept, but I refuse to harbor a false belief in an afterlife just feel better about death and nothingness.

It's easy to imagine being dead you ever wake up and forget where you are and how everything was black before you opened your eyes. It's just like that but like sleep you wouldn't realize the time that went by. Also yea I mean sometime I think about if in another life I could be in Japan or somewhere that doesn't have a join me or die cult trying to possess the whole worlds people.

I don't even think about it. When I'm dead, I'm dead. What may or may not happen afterward doesn't concern me.