Huge fan of Go Mono. I was taken aback at first at the idea of a monospace serifed font, but after trying it out I've come around to appreciate the clarity of it.
I'm tempted to switch to it, since it's remarkably similar to the Gallant font (a.k.a. sun12x22 / gallant12x22) I use on my OpenBSD and Linux virtual consoles. I tried using Gallant directly, but apparently Linux console fonts don't map cleanly to X11 bitmap fonts and it caused issues that I didn't feel like troubleshooting.