Hehe - I wanted a green ninja once I settled on the ninja 250 as a first bike, but the only green one I ever found was very heavily modified, and I didn't want to deal with that as a new rider. I found my blue one gently used at an amazing price, and Kawasaki's candy plasma blue is a very pretty color, but part of me has always wished it was green. Then I joined the day-glo-green jacket cult, and, well, green bikes clash slightly less.
I like the whole insect-like appearance of the green one. I imagine pulling into a parking lot full of people who have no idea what it is and saying matter of factly, "why, yes, I do ride a giant beetle."