I'm just putting something up so no one else gives me a welcome message on the talk page. I guess I'll leave that one there for now. :P
I've been doing minor editing since late 2004 or so. In October 2005 I finally decided to register.
In some ways, I liked editing articles more before. When people see an anonymous IP address edited something, they're more likely to click the entry and help fix mistakes/improve the article (in the process of looking for vandalism).
I'm having lots of fun checking for vandalism myself now, though.