If I had my choice I would just be buried out in the desert somewhere. Water is life and I'd like to think that my life is out there begetting more life or easing desperate conditions for some plant. The body is something like 70% water, that's a lot of water! Even the most ardent conservationist has to drink something to keep the reservior full. It would be good to give that water to something or someone else.
Personally, I would love to invent the Deathstill.
en.wikipedia.org/wiki/Fremen#Collection The legal authorities discourage do-it-yourself burial, so my hope is simply to get buried in such a way that my corpse benefits something living.