I'd hold supreme power and would change everyone's name to Randy Tonberry and would screw with everyone's posts to make them look like ignorant turds. *nods*
I wouldn't change much. I love the way things are now . . . except I'd get rid of over half the damn smileys and keep the cool ones with the anime sweatdrops. Also . . . I wouldn't have a word filter at all ( but I understand why there is one ).