Life after death poses lots of questions that have no answers, or better, whose probable answers we do not like, and as such we systematically try to ignore. So that we can still keep hope in there being something after life.
For example: If I die now, as a 38 year old man, and there is another life beyond this one where I keep my current consciousness of who I am and the experiences I have lived ... what happens if my 3 years old son dies? Is he a 3 years old being for the rest of ethernity? What if he had Down's Syndrom? Will he have his reasoning altered for ethernity?
Let us asume now that, if there is another life, it is a life where you aquire universal knowledge or consciousness, and as such a 3 years old matures abruptly, and a guy with Down's Syndrom suddenly gets full intelligence. In that case, how can I really say that they are still the same they were when in this life? We are the result of hugely complex interactuations with others, physical and intellectual limitations, and experiences in life. If we lose that, we are no longer ourselves, so in that sense there is no possible other life. It might be one, but since we -as we are now- will actually extinguish ourselves with our body, then whatever remains is not really "us".
In that sense, there is much more logic in reincarnation than in the classical religions, IMHO, as you get a new life (aka a new chance) that will also be determined by how good/bad you did in the previous one. You refine yourself and pay your debts, getting to be a better being. But there is a problem also with that: How many good beings do you know around you? I mean, pure good beings that you would consider worth the heaven? The percentage is so low, that you can hardly think that there is a refinement process going on among us through succesive reincarnations. If it does, then it certainly is not working very well
and has still a long way to go.