When I first realized (truly realized) there might not be an afterlife, I pondered the idea for a bit. It led to my trying to wrap my mind around the idea of non-existence ... lol ...it doesn't work, it's kind of freaky. This put me in such an eerie state of mind, and I felt exactly why people have the tendency to create/join religions. (I knew why before, but this time I really felt it in the pit of my soul-hole - lol)
The knowledge that we can never know anything for certain when it comes 'life after death' would keep me from putting a large amount of energy into any idea, but I must admit ... I like the idea maybe our 'souls' can be recycled. My after-life fantasy is that we all get another chance to experience this world from another body's perspective. :) To me, that is 'heaven' - *shrug* the Christian's version never did appeal to me.