(I hope it is obvious, but just in case there’s any confusion, all if this is IMHO.)
I do not identify myself as either an atheist or a theist, but I thought the theological questions would be interesting to answer, anyhow.
1a. That would depend on the person, obviously, but my guess is that most do not. If they wished for a God to exist, I’m sure most could be able to convince themselves to believing in the existence of God. The human mind is very adept at turning “wishes” into “beliefs”.
1b. Depends on your definition of “God”. Do I wish for an all-powerful, all-good entity that is separate from humanity? No. I want that all-good entity (or as I see it, more like an energy) to be present in every single piece of matter in existence. Just like there is no such thing as matter without heat, I believe there is no such thing as matter without God [within it].
2a. I would agree with them wholeheartedly. I believe there is no such place as hell.
2b. After the body dies, I imagine the “soul” becomes an energy/entity separate from that of the material world, but still conscious and sentient and existent in a realm that the human body, living, cannot imagine or comprehend. In the same vein, I can’t begin to imagine what it would feel like to die and cross over to such a place.
3a. “Heaven”, if by that you mean the place where the soul continues after we die, like mentioned above, cannot be understood by the human mind. In this place space and time are irrelevant, but everything in our memories is “tangible” and exists in every moment. The connections we have made with others do not die, and we continue to connect to both those who live (as these connections are forged while still in the material plane) and those who have died.
In this “Heaven”, pleasure is no longer “normalized”, since normalization occurs over time and time as we know it no longer exists. For all memories, we remember them with the same intensity of pleasure they occurred at; for all interactions “after” death we experience only the energy of goodness/God/whatever you want to call it, and are in a sense “unaware” of any normalization. All good is simply experienced as good.
3b. I would say my beliefs are closer to the definition of your description of “far-eastern religions such as Buddhism” than they are to many types and sects of Western religions.
Lobsang: Even if you believe that your loved one won’t see your gestures of respect, you may still want to give some sort of expression that you did love them. Whether said loved one is aware of it or not need not be a deterrent to grieving in your own way and expressing to others/the world/”God”/yourself that you did love them and will miss them. If you want to visit his grave and refresh the flowers there, no harm is being done, so I see no reason not to.
Also, I imagine if “God” did create humanity but didn’t incorporate theism, “he” figured the ability to reason was more important/central to our definition of self. Since there is no way in this world to prove/disprove his existence, having that idea implanted would violate our systems of reasoning, thus we would believe our entire system of logic to be inherently flawed and reject it. (I’m not saying it is perfect as is, but without any solidly implanted notions we have much more confidence in it and use it more frequently than we would otherwise.) We were given free will, and thus the license to develop beliefs on our own. Whether they will be corrected, verified or simply perpetuated after death is any living person’s guess.