Above all, do not read the slides to your audience, which is considered one of the single most annoying things a presenter can do; it also makes the presenter seem unprepared.
I agree with this statement. Any presentation that I've sat in where the presenter is reading directly off the slide makes me assume they put it together the night before. I know this is usually the case of some people are nervous so the rather look at the screen then the audience. I can't help but think if they put the information together they should know a good jest of it.