Interesting Topic. I think all of us would have our our philosophies in this regard. Personally, I don't believe in the concept of nothingness just as I don't believe in the logic surrounding Heaven and Hell. The fact is, you cannot experience anything without opposition. How will people experience eternal bliss in Heaven when they don't know the feeling of loss and vice-versa? We all know that memories begin to fade away as we age, and the concept of eternal makes the notion even more absurd, because as you would live for, let's assume 500 or so years in the said realm, by that time you would have completely forgotten your past life and the related emotions.
You would have no experiences in Heaven or hell then, as in this world, you know light exists because we have night, Love exists because you have hate, pleasure exists as you experience pain. This absence of yin and yang renders heaven and hell absolute for me. Nothingness doesn't exist in my opinion, as I do believe in spiritual existence that is the aggregate of our consciousness. I fully believe it exists in form of energy and is confined to the flesh, and death frees it. Nothingness has that note of eternity to it, and I don't believe in anything eternal. Whatever is created must meet an end, regardless of the fact that it may or may not be brought to a physical existence or not. I firmly believe in this abstraction, at least.
Reincarnation seems the only feasible option then, that whatever leaves the body is brought back to the living realm of form. But this concept scares me more than anything else. I would rather choose nothingness than be born over and over again without any memories of my past lives. The very thought of it makes me shudder. It's that scary. The eternal experience of death, without memories. I would never want such a fate for myself.