Hi! I've been a registered Wikipedia editor since May 2006. Basically, I started out reading articles and then realized it wouldn't be so hard to contribute. I'm not the world's foremost expert on anything, but hopefully I'm competent enough to contribute a little bit in different subject areas.
I do a fair bit of my editing in what one might consider menial tasks. If I'm reading an article that have typos, spelling errors, or grammatical errors, then I'll do a copy edit. I'll check out the recent changes and revert vandalism. Since about mid-2009, the biggest portion of my edit count has been disambiguating links.
But I've also added a solid bit of substantive content. Usually, this comes about when I'm reading a book or article, and then decide to look the topic up on Wikipedia. If I read something worth adding and I see that it's not included in Wikipedia article yet, then I'll add it in.
On March 5, 2010, I made my first edits to the Spanish language Wikipedia. My Spanish skills are very modest, so my Spanish edits will probably be very minor.