Can we have an option to list users by their daily average reputation gain? It should just be a simple
totalReputation / numOfDaysAsMember.
As a sub-request, can we get the exact number of days that someone is a member? I don't mind computing this metric myself, but something like "1 year" is way too inaccurate.
Thanks to the feedback so far (and so awesome of balpha to compute a snapshot), but here's a better idea:
If the rep/day metric is deemed too radically different from the rest of the metrics already implemented, then how about this: you know how tag-specific stats have both "all time" and "last 30 days" ladders? Well, the Users ladder right now is basically only "all time". If we can just have a "last 30 days" Users ladder, then it'd be even better than my original suggestion.
It measures exactly what it says: who in the last 30 days gained the most reps. It opens up one more avenue of competition, which will require more participation on a daily/monthly basis, which again is good for the community (e.g. currently, a top-ranked user can go on a month's vacation and probably wouldn't lose his/her spot in the "all time" ladder, but his/her standing in the "last 30 days" ladder could be compromised!).