I know this might seem like the waste of a new thread just to discuss the dock in Yosemite but to me its such a fundamental part of the OS X design. Ever since OS X the dock has been fundamental to the OS and is part of its clean look. For most people it's there all the time, staring at you, yet in Yosemite its 2D appearance was just too much, too ugly. Can't thank whoever made cDock enough (not going to link because don't want to seem like I'm advertising) but wow what a difference it makes, a 3D dock in the style of Yosemite just looks gorgeous! To me, Yosemite (apart from some of the icons), with a 3D dock is the perfect combination!