When I first got my PowerMac G5 several years ago, my first impression of the power button on it was bad. It's a clear example of form over function. It looks nice, but since the button is flat and level with the computer's front surface, it's difficult to find it by just feeling. I need to bend down to see the button to be able to find it.
But then I realized that even though it's annoying that I find it difficult to find the button, this also means that my son can't find it either and put the computer to sleep while I'm trying to use it.
Well, not any more. :-) My hack solution was to tape a piece of plastic over the button. Ugly but effective. Function over form.