I've also been using Ubuntu Mono for ages. Must be 15 years now! I have tried many other fonts, just to see if I'd enjoy a change, but the most jarring thing is how much space all other fonts seem to have. Ubuntu Mono gives me way more lines on screen, without setting the font size far too small. Is the "condensed" property that is being mentioned in this thread? I've asked about this before but nobody has ever said "condensed".