When I'm not working or moderating Stack Apps, I have a tendency to meddle in bug reports on Meta or take part in writing userscripts for the Stack Exchange network which add features that sometimes get implemented natively. Here's a few you may be interested in:
- Autoconversion of bare Stack Exchange URLs in comments
- Keyboard navigation and
- Enhancements to the network reputation graph
- Stack Exchange reputation/moderator status display on Meta Stack Exchange
I've also been known to occasionally break (and sometimes fix!) the Data Explorer, and to busy myself with maintaining the Election Statistics page.