I use the desktop for work, since April 2011 Linux desktops have promoted Eye Candy above Functionality.
I am not just moaning about Fedora here, these are generalized complaints.
Will I be able to switch instantly between windows/desktops ? probably not, there will be some lag due to the necessities of Eye Candy. Will I have a visual indicator of which documents I have open, nope, I will have to rely on subtle clues hidden at the edge of the monitor to hunt for them. Will I be able to quickly and easily navigate/tab down to some little used graphics program, nope I will to use a graphic menu clicking all over the place and making sense of the whole screen or even worse have to google for the name and type it in.