I'll leave it up to my family.
I don't want to impose my will on something that is, ultimately, not for me.
If they want to cremate me and flush me down the toilet because of the shitty things I've done, I would be fine with it. If they decide to have an expensive ceremony and invite everyone that ever knew me to bury me next to my sweet great-grandmother whom I totally don't deserve to lay beside, I'm equally fine.
Funerals, gravestones and such are for the living, imo, so they should make the arrangements that suit them best.