I stick with Consolas just because most other fonts seem to not have a complete UTF-8 character set and don't fallback properly to other sets.
Though I've been half tempted to spin my own (not like I don't know how) as I don't understand why so many monospace fonts seem to like to make the x-height at 60% or less of the cap-height. Looks REALLY stupid when it is at 50% or so. The lack of stress on the horizontal also feels a bit unnatural as so many of them are thin-glyph with no differentiation between bars and slabs.
Too many years of looking at CGA and MDA fonts makes me miss the double-width bars with thinner slabs, hairlines, and arms. You'd think given how font-smoothing works we'd have seen a return of that type of font for legibility sake alone, just with less serifs.