I am a researcher in astronomy (planetary science) living in the USA.
My edits have largely concentrated on baseball, American and European history, and Christianity. More recently, I have edited some articles concerning politics and even some on astronomy.
One of my Wikipedian interests is lead sections. I like to make sure that introductions are concise and summary, so that a first glance at an article will inform rather than scare away the casual reader.
Although I enjoy editing Wikipedia, the time I spend doing so is limited by family and work commitments.
See my talk and my contributions and my statistics.