Ignoring the obvious mathemetical insinuations. I find the concept of nothing, in its absolute form, most intruiging.
Logic tells us there was once a beginning. And that before 'creation', there was (not in the sense of existance) absolute nothing. (No space, no blackness, no universe, no time, absolute nothing.)
We also know for a fact, that this is not the case now, as evidenced by our presence.
We also know that the concept of space is not finite in our existance. That there can not be any borders in terms of space, for if there were, everything would collapse. There may be borders in measurable magnetic influence. Perhaps matter as we know it would seize to exist if you go far enough. But as magnetism is parabolic, it's reach is too infinite. Wether measurable or not. So we may be able to define an 'edge' by our dimensional standards. But there's no true end of existance. There can't be absolute nothing, for absolute nothing can not exist in an absolutely existing universe.
Anyways for some reason, the creation of space (and time as its measurement) must have been a logical result of absolute nothing. So in one instant, the first instant in all of history in fact, nothing exploded into infinite space. Like, elementary.
The funny thing is, there is no center in space. As it's infinite, sprung from nothingness, there can be no center or start point. So it was created equally at every location? Why does known celestial bodies appear to be moving apart? Is the birth of magnetism, the stabilizer of the universe, the reason matter sprung from one single location?
But then, there's like, where did the electrons, neutrons and protons come from? Were they a natural result of stabilisation of our dimension? A method of controlling infinite space without causing it to collapse?
Either way, nothing is not nothing anymore. To us it is now a concept. Its existance, or lack thereof, is no source of understanding for us. The instant it all began is what's interesting. What was before that is of no interest at all.