Hello! I'm MacArthur44. I'm a fairly novice editor at this point- I classify myself primarily as a "bug catcher" who cleans up typos, grammatical errors, bad links, and other such minutiae, "fine-tuning" this remarkable encyclopedia (and gaining editing experience in the process) to the best of my ability. I do occasionally expand or overhaul articles as needed, and have a few ideas for new articles once I have more time on my hands, and more confidence in my editing abilities.
You'll find that the articles I edit don't follow any clear pattern as far as topics go; I read whatever is interesting to me at any given moment (or just hit the random article button), and try to improve that reading experience for others if I feel it can be made better. I do, however, consider classical music to be my primary area of expertise, and history (esp. U.S. history) as another area in which I am confident enough to contribute on a larger scale.
I find that Wikipedia gets an unfairly bad rap in academic circles. To me, it is one of the greatest things humans have ever achieved, and I think that anyone with even a remote interest should consider contributing.