As well as being a contributor to Wikipedia, I also frequent the other Wikimedia Projects; especially Wiktionary and Wikispecies.
For Wiktionary, I am most interested in adding ancient languages such as Middle KingdomEgyptian and occassionally Sumerian. I also do as well as I can to update Turkish translations, though I myself am still learning it as a hobby and feel uncomforable doing more than just simple words.
For Wikispecies, I add whatever I find missing to make the Taxonomicon as complete as possible. Right now I'm working particularly on updating species under Lepidoptera, and cross-adding with Wikipedia when I have more than just a binomial name. For example: the Tropical American Silkworm Moth.
The Whole Shebang
The bearer of this is a Wikipedian who shall be permitted to freely edit Wikipedia.