Spaaaaaace!!!!!

The following image is mostly comprised of negative space:

The next image has more positive space:

And this last image has a good balance of both:

And yes, all of these images were of zebras. XD

As for symmetry,  I absolutelly love this mountain image that has loads of it:

For a lack of symmetry, this volcano eruption is not very symmetrical, but still makes a good image:

That last image also has a fair amount of negative space. :)

And lastly, a nearly perfectly symmetrical image of a zebra. :D