I think it is your decision!
I, personally, want to be buried with all of my organs attached, with what I was born with, I would like to keep even in death.
Personally, I do see the plus side to saving lives but the other is that they will cut your body to take everything from you, sort of taking oyur life away even after death. Im not religious, but I do not want to share the organs that I was born with to anyone else unless it is for a family/blood member.
Otherwise, who's life are you saving? It could be a drug addicts that needs an organ, it could be someone who doesn't deserve it.
I would like to keep them, but that's my choice, you should make your own.
RussianVillain.