I'm going to assume a few things:
A: I don't believe in an afterlife or anything, but for the sake of this, I will act as if there is one, and that I believe.
B: I was raised Mormon, so I will go with the Mormon concepts of Heaven and Hell.
And I choose Heaven. Mormonism gets pretty weird on subjects like this. See, Heaven is divided into 3 sections (Degrees of Glory). The lowest is where really bad people go, the highest is where really good believers go (the highest is further divided into 3 sub-degrees, but we don't know much about them. I think they have to do with how often you are in the presence of God or something), and everybody else goes in the middle degree. We don't know what it's really like there, but according to early prophets, even the lowest is so amazing that people would kill themselves to get there. The Mormon God is real bro
Anyway, in the highest Degree of Glory, you become "like a God". Basically, if you're really good in your Earth life and are Mormon, you eventually become a God and can create your own universe and whatnot. Also, it is believed that our God was once human and went through a similar process that we are going through now.
All in all, Mormons have some pretty interesting beliefs. It is the only Christian religion I know of that has specifically said there are aliens (there are other planets inhabited by humans, or at least beings extremely close to humans; not all of God's Children could fit on one planet, apparently ). Or also the belief that God didn't create the universe out of nothing, but that all the matter and energy existed before hand, and he simply influenced physics to form it in certain ways, which is the reason why you almost never see Mormons bashing science; The Big Bang, Evolution, planet and star formation? Yeah, it all happened, but God made it happen the way it did Same with miracles; instead of saying "fuck you physics, it's Jesus time", Jesus said "hey, physics... you know that really cool shit that is technically possible but so improbable that it might as well never happen? Let's do that".
Again, I'm an atheist, but Mormonism is a very interesting religion.