Smiley yellow, because no one else will use that color and you'll be able to identify your machine from a long way away. Also, it looks very contrasty with the black case.

And the winner is:Attachment 12628
It turns out that no tools are required to swap out the palm rests. I just have to slide out the battery and floppy drive.

It looks nice and the soft rest feels good. I will now start customizing the top.

Nice choice!

I voted for yellow because it was behind.

I can pretty safely say that even when I get bored and switch again, yellow will probably not be the one I choose.

I like that luminescent green.