Burned. Cemeteries have become businesses and It will be costly for my future family/kids to keep me in one.

When I went trekking in the Himalayas, i Happen to come across some “funerals” that were happening there. My Nepalese guide insisted we stayed and watched so I did. They basically built a pyre out of long chopped wood and built it up to maybe 3-4 foot high then the body would be carried out which was wrapped in non-coloured cotton and layed on top then they burnt them. It seemed a much more better and natural way of doing it rather than the way we westerners doit. It was done in the open and it was more a celebration of their life (there were obviously some people crying) but it just seems more proper, people were dressed in brighter colours rather than the dull morbid black that we do it. That’s the way I’d like my body to be rid of but sadly it’s illegal to do it that way in my country.

Jettisoned into space en route to the andromeda galaxy.

With some luck in time an alien race will find it and use their advanced tech to reconstruct me.

Burned, I don't want people paying money just to have my body preserved in a coffin, which will end up rotting anyways.

Same here!

Both my in-laws are in the form of ashes in separate opaque rectangular containers stored in a tote bag in the closet of our home office.

Depends on how much I hate my family by then.

I am immortal, so this doesn't apply to me.

Whatever is cheapest, so probably the nearest ditch.

Eaten.