Courier New is an excellent monospaced (non-proportional) typeface introduced with Windows 3.1. As a UI designer, I cannot tell how many year I have worked with Courier New. As the release of Visual Studio 2010 and the new MSDN, Consolas becomes the default font of code.
The latest code font definition of MSDN is:
font-family: Consolas, Courier, monospace; font-size: 0.83em;
Although it is introduced with Windows Vista and Office 2007, Consolas first came into my eyes later along with dev10. After playing with it for over 2 years, I think it is time to say goodbye to Courier New and catch up with the UI design of Visual Studio and MSDN.
For me, Courier New is as beautiful as Consolas; Consolas rocks mainly because of ClearType.