All public speakers have some level of rhetorical legerdemain they employ, and they all get annoying when overexposed.
As for items ending in 'ly,' a rather interesting book I read on the topic of Showing, not Telling, "-ly" is the easiest thing to search for to find times when you are telling. "He walked happily through the field" vs. "He skipped through the field with a grin." The first one I told you he was happy, the second one I showed you through his actions and description that he was happy.
That was another thought-provoking article @Comicality Thanks! This ties in heavily with showing and not telling.