I would show you my wings, but there's nothing to say that you won't ascribe them to some other supernatural being.
I haven't looked into the science of the architecture of heaven. It's not really my specialty, but I suppose if your version of heaven is being with your family, then that's what it is. It might simply be a matter of being the moment you were most at peace? I don't recall ever saying it was immortality. Unless there are extenuating circumstances once you're dead, you stay dead.
Ah. Vampires, Werewolves, Shifters and other beings of that nature go to Purgatory. I can't comment to what that's like and...honestly I'm not sure what happens when angels and demons die either.