Anybody who has written a will has contemplated mortality. Actually it is pretty fun to include jokes and insults in a will - the ultimate last word.
As to what it will "be like" after death, it will likely be very much like the 13.8 billion years before we were born. Less fun, but not bad at all.
As for my body, I'd prefer it return directly and naturally to the soil so it nourishes plants and stuff. It started and will end up as stardust anyway.