Hi,
After reading an interesting related discussion on GenderGap, I have queried the top 10 users of the thanks feature last month, on both the English Wikipedia and Commons. Snapshot image attached and report link below.
Perhaps someone might think of a suitable barnstar and award these folks for "being nice"? :-)
Link: http://commons.wikimedia.org/w/index.php?title=User:F%C3%A6/sandbox&oldi...
P.S. This is a long query to run, taking 20 to 30 minutes due to the nature of the logging tables. However if someone wanted to make a monthly summary on-wiki somewhere, part of an active "be nice" campaign, I would be happy to set up an automated monthly report (if someone discovers this is already reported somewhere, that's cool we can use that).
Fae