Generally, I make little style edits and sometimes use Huggle to revert vandalism and other non-constructive edits. I also use AWB, but it's far more linear and less exciting. I've made mistakes in the past: with a single click in Huggle, I once inadvertently pulled 113 revisions out of Tony Snow's page instead of just one. So, I'm somewhat humbled and invite questions and criticism. Just say the word and I'll just relegate myself to decapitalizing non-proper section headings and correcting en and em dashes, since those are unequivocal, based on stable guidelines, and comprise 90% of my edits anyway.