It's my default monospaced font as well. I've tried Inconsolata, Terminus, Anonymous (Pro), etc. and though I could happily use most of them I find monofur to be easy on my eyes, clear, and just a little Art Deco in feel if not in history. Using it was a whim that's stuck with me for several years and I'm happy I stumbled across it. It's spread to a few friends via the "what the heck is that", "eh, might as well try it", "this is really nice!" cycle.