As the title suggests, I am an active editor on the English Wikipedia, where I contribute primarily as User:WWB and have been editing in some way, shape or form since the middle of 2006.
Like many, I began with simple changes to existing articles. Beyond that I continued with simple spelling, grammar and formatting corrections, which led to more substantial contributions to existing articles and, eventually, creating new ones. (Of course, I still like to fix spelling and formatting.) Although edit counts alone present an incomplete picture of ones’ contribution, as of the third quarter of 2010 I have made nearly 1,700 edits across more than 600 articles.