If you are heavy coder you should make sure and use a font that your eyes agree with. This nice write up has plenty of options.

What follows is a round-up of the top 10 readily-available monospace fonts. Many of these fonts are bundled along with modern operating systems, but most are free for download on the web. A few, notably Consolas, are part of commercial software.

Top 10 Programming Fonts via Hivelogic.