My mum discussed it with me in depth when she was in her last days. She had some alterations she wanted to make to her original plan, since she found out the environmental cost of creamation. So we did a very green funeral for her.
Green burial site, no markers, humanist celebrant, the flowers were native species picked within 2 miles of where she lived, no cellophane or plastic wrap. Biodegradable coffin, graveside eulogy by the celebrant, a poem read by eldest grandchild and a (pre-recorded) song by her younger grandchildren. It was lovely, really. Almost 200 friends and family and a berautiful tribute to her.
My dad will be buried in the same plot.
My FIL wanted a direct cremation, insisted no service, nothing said or done to mark it, ashes scattered at the garden of remembrance of the cemetery his parents and grandparents were at. His children and grrandchildren found that extremely difficult. They were very upset at the lack of closure. It wasn't the best experience.
I want a green burial, don't care who wants to speak or doesn't, it's up to them. No religion. But if my family want to have a meal out courtesy of my estate (such as it is) they're more than welcome. I like the idea of being part of the carbon cycle, my atoms going on to become part of plants and insects and funghi and everything.
If I had a memorial thing, I'd quite like a bench at the local RSPB reserve. I'm always grateful to those who've had benches put there so I can rest my arthritic joints while I go to see the birds and otters. I thank them by name when sit on them.