Although I originally started on English Wikipedia in 2004, I've been mostly active on German Wikipedia since March 2006. My main focus for content is the politics and history of the United States with an emphasis on history of law. Behind the scenes, my focus has lied on categories and templates founding the respective WikiProjects on German Wikipedia. I'm admin and an arbitrator on German Wikipedia and bureaucrat on English and Beta Wikiversity where I help mostly by providing technical assistance. You can also contact me if you need information from the German OTRS queues.
I've also created a new archiving bot (yes, yet another one) which was originally built to meet the requirements of German Wikipedia but has since been ported to English and is in use in other projects as well.
Top Ten Signs You Are Spending Too Much Time With Wikimedia Projects
10. You sign e-mails with ~~~~.
9. You notice what you've done and send them like that anyway.