There re so many natural shapes that can be called Perfect or nearly perfect: like a fruit, a leaf, a flower,a tree,a shell so on and so forth. It is easy to find and photograph.
And I quote Stacey from the previous contest topic poll;
"I suggested electricity. I thought it'd be something everyone can work with. Electricity can be seen, as in lightning, or something that is felt. I think it could also be represented in many ways, such as shapes, colors, patterns, etc. Just need a little imagination. =)"
Sounds like an imaginative and challenging topic, open to all genres of art.
I suggest camoflage. It can be anything that's disguised as something else. It can be mimicry in the animal kingdom or something designed by people to do something that isn't obvious. Say a cell phone tower that looks like a tree, etc.