I've tried (and continue to try) several programming fonts, but always stick with Terminus. In my opinion, it is the most readable font at 8px, and I like being able to fit as much as possible in a screenful without losing readability. Most of the other fonts I've tried seem more suited for sizes 10pt and larger, and that's fine, I would consider them for usage in my web browser, or some other place. But my console windows are all Terminus.