[inferno0069]

All the odds would look like a full checkerboard, not like these diagonals. The fact that some diagonal lines appear to be favored over other nearby diagonal lines of odd numbers is still interesting.

[Barnabas]

Of course it's interesting. There's no such thing as an uninteresting number. http://en.wikipedia.org/wiki/Interesting_number_paradox

[PebblesRox]

Not coloring all the odds, just plotting only odds and still coloring only the primes. The new spiral has a 3 where the old two was and a 5 where the old three was, etc.