What do you believe happens to you after death?
Well, let's start by looking at hard scientific evidence. By that I mean evidence about who we are and how we work. I don't want to overstate the case. There's a lot that isn't well understood, but we're getting there. And from what we have at the moment it looks as tho' we're just like every other animal and that everything we are derives from our biochemistry and our brain - both the wiring and the patterns of electrical activity that can be monitored when we think, act, ruminate, listen to music, and so on. I don't want to underplay the complexity of this - we're also the creators of our society and its culture, which in turn influences the way we become who we are. There are all sorts of feedback loops, social, chemical, physical. But when it comes down to it everything comes together in our brains - electrically in our patterns of brainwaves, chemically through neuro-transmitters, physically in the way neural networks are set up.
As an example let's take something as simple as colour. There is no such thing as colour apart from our brains. Light of different wavelengths strikes objects and is reflected or absorbed, depending on whether it is reacting with a pigment, a refraction grating, or whatever. The reflected light waves strike the rods in our retinas. They send a chemical signal to the brain that conveys information about the energy with which they are struck, and the wavelength of the incoming rays. Different rods respond to different wavelengths. The brain receives this information and interprets it as colour. There is no way to tell whether what you see when you look at a pillar box is the same as what I see; all we can do is agree to call it 'red'. The brain interprets chemical information about physical events, and our brains give us colour. Some small differences in the way that information is passed and we'd stop seeing red and see ultraviolet instead, the same way birds and insects do. Some reptiles can see heat, that is, infrared radiation. But everything depends on what our brains do with the chemical information sent by our receptors. There is no colour as such in the world, only the physics and chemistry that gives rise to the interpretation as colour in our brains.
When there is brain activity, we, our conscious selves and our bodies, exist. When there isn't, we don't. So I do not see how it is possible to even think about a self independent of a brain, let alone independent of a body. When our brain stops, our bodies stop, our consciousness stops, we stop. So what happens after death? Nothing. We don't exist any more after death than we do before conception. After death we don't exist, therefore nothing happens to us.
If you're going to argue otherwise, then you have to show how we're different from every other living thing, that we can exist without the physical support of our brains, and I have never heard an argument that can successfully make that point.
