Most models of the after live I find extremely implausible, but there is one model I find particularly plausible and I do not consider it a product of wishful thinking; it just resolves a paradox about how your soul was generated into existence.
I feel that when you die you forget that you were ever born at all in the first place, which of course begs the question "how did you managed to be born in the first place in spited of the exponential odds? So I speculate that your sense of self is not entirely obliterated at death it is just very much reduced. Reduced to the phase when the universe reached a critical level of complexity for consciousness to emerge. This critical level of complexity was inclusive of a form of consciousness that existed but only at an unstable "blank slate" level. Then because of the instability, a phase in nature known as a "phase transition" it fragmented in to millions of possible directions millions of possible entities and chaotic randomness selected you as just one of them though a world line through space and time.
My theory speculates that when you die you once again feel at one with this universal unstable blank slate, then a Gestalt Switching mechanism forces you along just one world line of one entity of a brain through space and time. Over trillions of lifetimes you will eventually experience the life of every conscious being that ever lived and ever will live, because you will keep switching back and forth through time as time is just a fixed dimension and does not really flow from the past to the future.
MWL