I believe that life after death would be something like lucid dreaming, in that everything would appear real and tangible as it is in this life, except that you could willingly change it to suit you in the blink of an eye (think: Vanilla Sky). In this sense I think an afterlife would be something like your own personalized paradise world to create and explore. And yes I know that might sound like a bunch of idealistic fantasy crap, but in my opinion it's the most appealing idea I've heard of yet, or at least how I'm hoping it turns out to be.
