I discovered Drupal in 2005 while researching content management systems for the WEFT website. I test drove several of them at OpenSourceCMS, and Drupal just felt good. It turns out it is good—very good!
Since then, I've spent countless hours hacking on various Drupal components and building sites with it. Currently, I'm helping maintain the Path Redirect module. Not that it was terribly buggy to begin with, but I have fixed quite a few bugs in it and helped implement some new features, including porting it to Drupal 6.