I often try to imagine such a thing but all that happens is me laughing uncontrollably because of the absurdity of such an existence.
Think about it. So do you have a form in the after life? Do you look like your self but maybe perfect? So your hair is brushed perfectly and it is free of split ends. You can change the style at will? Do you have a perfect tan to go with it? Or maybe your thing is being as pale as possible? In either way maybe if you didn't like your appearance in this life you could take on a whole new one? You could be this eight armed winged dragon with four heads but each head has long blond hair.
So are you naked in the after life? Or do you wear some celestial garments that never have to be cleaned? They are always perfectly spotless? Maybe your garments have a Budweiser logo on it that will never fade, well unless you want it to have that worn in look that is.
Maybe you don't have a body at all. You are just this floating intelligence that takes up every single spot of space. Everyone is this giant overlapping brain in a sense. You just exist to say, "Oh wow, so that's why that happened". Or, "Oh, I get it now... well that makes sense." But all the things that you did in your life, are meaningless or trivial or insignificant now? Maybe they seem all petty and demeaning now that you are this intelligent brain that understands everything. But what do you do now? I mean, are you going to go play hide and go seek for the rest of eternity? You can't because where ever you go, you are already there hiding.
No matter which way I try to determine how things would be, it ends up being irrational and not logical. Okay so you say well that existence would be irrational and not logical. Any thing can happen. Well then I wouldn't be me in that existence. Everything that makes me now would no longer be me then. If I am not who I was then what is this new identity? It would be completely and absolutely foreign that you wouldn't be able to make heads or tails of it. It would be like being in a constant state of confusion of not knowing where or what or who or when or why or how or if, this is really happening or not.
So is the other dimension just like this one, except physics doesn't apply and it's pure magical? You don't need to eat or sleep. You can fly and zip around the universe like superman. Go have a non-eating picnic on some asteroid.
Sometimes I think that no one really goes any further than making the claim, "There is life after death". Well okay, if you are so convinced or feel that there is, can you fill me in on how such an existence would work? Because I would really, really, really... really like to find that out.