People are not coming to see your slides. They are coming to see you. Everything about your presentation should reinforce that fact. Like any good story, keeping a rapt audience involves doling out the plot in measured increments. Subtitling yourself on your slides might be a great way to organize your thoughts but it’s a surefire way to lose your audience. They read faster than you can possibly speak. You lose their attention twice when you show a slide with bullet points—once when the slide appears and their brain is muting you while they read, and once again when they return their attention to you, because now you’re just repeating what they’ve read. Mitigate this by never ever using bullet points or animation, and writing your content in a fashion that generates more questions than it supplies answers.
(Full Story: http://gazit.me/2012/12/05/designing-presentations.html )