personally like the Metro UI for Visual Studio 2102 but still some people are not happy with it. They really like Old Visual Studio 2010 layout and they wanted to have same kind of color in visual studio 2012. For those who want to change the color of Visual studio there is a plug called Visual Studio 2012 Color Theme editor. From which you can set colors for visual studio UI and make your visual studio look colorful. Following is a link for that.
Once you download that from above location and click on installer it will ask for accepting terms and conditions like following.