It would be interesting to see karma-per-word, as well, as a kind of succinctness density factor. Although karma points are not equivalent to quality, and you’d need to also factor in average comment length and some other things.
To use myself:
31,273 karma / 351,012 words ≈ 0.0891 karma per word
A quirky feature of HN is that you can only see detailed karma counts for your own posts. One of these days I plan to scrape all of mine so I can sort by karma and do some meta-commentary.
A lot of people have given me some really great ideas. Commenting to have them in backlog whenever I get bored and think to add addition. I would just be interested in having a dump/export of my comments personally as well (someone else wanted to/analyze all of their comments and have them in a floppy disk, maybe this can help their idea too!)