May be I pay attention to silly things, but some fonts are easier to read than others and if you keep writing or reading code during hours and hours, the font that you use may very well affect your productivity (just a theory , besides, far more ridiculous stuff has made it's way in the Internet). Anyways, this is a code section with the standard Visual Studio font (Courier New Size 10):
The Consolas font was created for Windows Vista but you can download and install it for Visual Studio 2005, at size 10 it looks like this:
Note how more code fits in the same region and, IMHO, it's somewhat more readable. Finally, the Anonymous font was born in the Mac but you can download it free for Windows. The same code section in a smaller size (9 point) looks like this:
Before Consolas debut, Anonymous was the one that I used. There are many fonts for programmers available (free, expensive, nice, silly, ...) What do you think? What font do you prefer for code? Does it even matter?