I find reviewing suggested edits a great way to kill a few spare minutes, but I'm still quite apprehensive about whether I'm being too lenient when approving, or too anal when rejecting edits.
I occasionally look through my "reviews" activity, but clicking through each item to see the final judgement is a real pain. Furthermore, simply looking through a few entries may not be representative of the greater good since all it takes is 2 other approvals/rejections to overrule my judgement (or the 1 other to push it through).
It would therefore be nice to know my cumulative hit rate. Perhaps something along the lines of:
Clicking on the "40 overruled" would then filter down list of suggested edits to those that I should have rejected (or ignored) instead. It would then be down to me to determine which ones I'm doing wrong and which are just down to different opinions.
Alternatively, since the suggested edit page already display some reviewer stats ("So-and-so approved X edit suggestions, and rejected Y edit suggestions."), stats on hit rate could be inserted there to avoid making major changes to the UI.