That is kinda hard to answer without knowing what you might find out. Life is what you make it and I think death might be the same. I was watching Bill Maher last night on tv and his biggest complaint about religion was that nobody can tell you what happens after you die, so why all the preaching?
If we were meant to know what happens after death, I think someone would have figured it out by now. Near death experiences do interest me, especially young children. But you can have out of body experiences with hallucinogenics, as one poster mentioned. It does change your viewpoint about what is real. So much of life is an illusion, you must strip off several layers to even get to the real you.
To answer the question outright, no I would not change anything. But we don't have that option anyway, or do we?