Just thought I would mention, since I haven't talked about fonts for a while, that I would give a short update.
About a year ago, I decided to try Adobe Source Code Pro, a new fixed-width font.
Since I kind of forgot that I was using it, and the experiment has gone on a year, I'll consider it a success.
I definitely notice that Source Code Pro is better suited to the desktop and laptop world: the font has a bit higher heights and feels a little more natural at lower dpi, larger screens (compared to Droid Sans Mono).
It's free. Give it a shot.
P.S. Also, the web site got a bit of a facelift!