I'll grant that Droid has a number of typographical problems outlined nicely in that article (although I suspect his complains about kerning and colour might well be addressed by careful choice of GNOME's font-rendering options), but nevertheless I find Droid to be the most pleasant-to-read Free-as-in-speech font I know of. It's certainly slicker than the slow-moving and clumsy Vera/DejaVu, and the less said about the Liberation the better.

You could probably tempt me with Lucida Sans, if B&H ever released outline versions to go with the X11 bitmap fonts, but until another giant corporation shells out for a new custom typeface or FontForge becomes usable by designers, Droid is where it's at.

I used Droid for a long time and now am using Cantarell (another GPL font) for my interface... along with Inconsolata for monospace.

Huh, I hadn't heard of Cantarell before. At first glance, the hinting and so forth isn't quite as polished as Droid, but I'll use it for while and see if it grows on me.