I believe that when you die, you're dead. Your brain shuts off, your heart shuts off, your lungs shut off, everything is off and you have no control of anything and you have no thoughts. I am not an Atheist nor am I a part of any main religion(Christianity, Catholicism, Judaism, etc.). It's just, from a logical viewpoint that is what happens.
Though that is what I believe, I will admit I do happen to stumble upon the thought quite often, that if there is a spirit and such and it lives on, could the afterlife be what you imagined it to be? For example, if you spent your whole life believing in Heaven and Hell and you believed you were a good person, would you go to Heaven because that is what you thought your entire life and vice versa with Hell? This is a mere thought and is not my belief, but I find all these theoretical ideas fairly interesting whether or not I agree.