I enjoy a good presentation that makes it easy for me to learn new things or that transfers a message in an entertaining way. And noone I know of does it better than Steve Jobs. His keynote at MacWorld 2008 where he introduced the MacBook Air is legen... (wait for it) ...dary!
Carmine Gallo even wrote a book about his presentation style named "The Presentation Secrets of Steve Jobs". And in this SlideShare presentation, he summarizes the key points which push Steve's presentations from good to great.
Interesting, right? I recommend you take the time to watch his MacWorld 2008 keynote (again) and learn how he not only gets his message across, but how he really hammers it home.