The win-c one then, I've never been fond of using the mouse when there's a good keyboard shortcut. I wonder if that's one reasen I haven't found win8 to be so bad as many other have.
Same goes for the start menu/start screen. With win7 95% of what I used was in the quick-part of the menu, in win8 I tap the windows button and typ three or four letters of the name and in 95% of the cases the first program in the list is the one I want. I'm pretty sure it "learns" too.