That's a way to make people remember you.

But I thought you were immortal?

Luciene wrote: You are remembered by the things you did on Earth. Not by your dead body, or teeth.

Something physical helps. Scattering your ashes into a river is so final. A Tombstone with some funny last words is a good way to sleep.

Cryogenics for me :P

The crystalline particles pierce every cell in your body. You ain't waking up from that.

Unless you're specifically built for it, of course, but sadly we're not one of the few species that are.
There's a species of frog that can survive being frozen in liquid nitrogen.

Talking of amusing tombstones...

^That one's almost worth being buried for...

Yes, Ianna. I intend to transcend a physical body.

"I was Somebody. Who is no business of yours."

I saw that while burning people's bodies. I want something like that.

What does it matter how your body is disposed of, anyway?

Danse Macabre.