The classic understanding of the void have always been the representation of nothingness, emptiness, zero, void, and this is often associated with darkness.
Since personal perspective is being asked of, I will define it based on my subjective experience of the concept of the void.
The void is not darkness, emptiness, nothingness or any other similar concept people often associate it with, for one to recognize that it is empty or dark is to recognize that no-thing is making it evident, it acts as a container of the existence of the perceived "nothingness." This is very difficult to explain with just words since it is bordering on both philosophy and metaphysics, so I'm going to give an oversimplified example that may or may not be alien to most people:
In Dzogchen teaching, there is a concept of groundness, a pristine awareness known as "Rigpa" - which is of no origin and primordially existent, the purest most fundamental form of consciousness. It transcends the boundaries of the mind and the perceived sense of self. It encapsulates everything in our own subjective experiences generated by our own senses.
When our stream of consciousness stops for a brief moment, we are present and we truly become free, we call this our "flow state" where there is nothing else in our minds but the present moment, which gives birth to creativity and new ideas. While this only last from milliseconds to a few seconds, it's significant enough to make a difference. The mind rests on the consciousness and consciousness is recognized by the Rigpa.
The Big Bang theory says the same thing about the void. Billions of years of chain reaction from no-thing guided by a deterministic universe have lead us to where we are now. Everything that we see, hear, care about, our history - all are offsprings of this concept.
Emptiness, darkness, nothingness - sits on the very same ground and is contained in the void. The void itself is both the substrate (containment) and the observer (Rigpa). The void can contain nothing and something simultaneously. It can create and destroy things that can arise from its nothingness, for the void is of no origin and we humans are its creations.