AF is not over rated for certain situations, but I find it extremely liberating to use manual focus and not have to worry about putting a red box overtop of what you want in focus. Using a true manual focus lens like the Zeiss 35mm, a camera with a nice bright viewfinder like the 5d2 with an EGS screen, focusing becomes just natural. Look at what you want in focus and turn the focus ring until it is in focus and you are done. No need of selecting focus point, ensuring the point is over what you need in focus, quite often needing to change your coposition because the focus does not fall on what you are tring to get infocus.
It takes a little practice to train your eyes, but once you get the hang of it, manual focus is extremely liberating. Now if we are talking about focus tracking...then automation has it all over manual.
again how about some example shots of moving stuff like people kids.