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.