After dozens of fonts tried, the top 3 coding fonts I use are (in no particular order):

• Source Code Pro
• Ubuntu Mono
• Inconsolata

Honorable mention:

• Proggy – thanks Greg

I originally posted Top 3 Coding Fonts on Coderwall but did not want to forget it so I duplicated it here.

Update 1 (08.12.2014)

Thanks to Greg, I have been introduced to Input: Fonts for Code. This is the font I’m currently using and dig it so far. We’ll see how it fairs over time.