Most of my contributions have been focused on ice hockey—in particular, goaltenders and the history of the game. Nowadays, I have branched out into a variety of other topics. Several articles that I have contributed to have been featured in the Did You Know? section, or listed as a Good article, Featured article, or Featured list. I used to maintain a list (now at User:Maxim/Articles), but I have the feeling it is not entirely accurate anymore.
Other things of note:
/Sandbox: Large page, inadvisable to load. Contains an old modified bot-generated list of hockey articles. I use the related changes as a hockey watchlist.
/Sandbox2: Presently contains list of possible articles to create.
Filter 391: I wrote this filter to log and tag when the height or weight of a living person is changed in an infobox field by a new or unregistered user. Many of these edits are in fact sneaky vandalism, and the result of this filter may be patrolled through recent changes.