My understanding of good presentation design is a presentation that is clear and concise, yet thorough and insightful. According to Garr Reynolds in Presentation Zen there are four big principles can make your presentations more satisfying and effective, these principles are: contrast, repetition, alignment, and proximity. (The Big Four: Contrast, Repetition, Alignment, Proximity) In Presentation Zen: How to Design & Deliver Presentations Like a Pro Garr Reynolds listed: simplicity, moderation and minimization of chaos and clutter as basic concepts which can and will improve our presentation effectiveness and increase the connection power of our presentation content. (Reynolds G. ) In other words a good presentation design provides the audience with the detail needed in a way that does not overload or overstimulate their senses, while at the same time it also does not bore them to sleep with needlessly excruciating details, and wordy explanations that are better left to the detailed research manuscript.
For example Air Force training courses are typically examples of bad presentation design, they are loaded with bulleted statements which the presenter then reads verbatim from the screen. Two major problems with this are the amount of information is more than the audience can visually process in three seconds, and slides can be more effectively used by giving the audience a visual image that can stimulate a second channels and thereby reinforcing the audible message. (Presentation Zen: How to Design & Deliver Presentations Like a Pro)
It is like the difference between watching a movie in 1960 black and white as compared to the high-definition and color of todays 70” flat screen televisions. In this illustration the black and white movie of the 1960 was good back in the day and is similar to the bulleted PowerPoint presentation, however, people did not sit in front of a television watching hours of movies back in the 1960, nor did they spend hours on a computer every day, therefore our minds have come to depend on the high definition color picture to contrast the information for us and provide that mental image that enlightens and stimulates our minds and is now depended on to make those need mental connection for learning and memory.
Illustration of Ineffective Bulleted PowerPoint Presentation Slides

Illustration of Effective Presentation Slide

Notes: 72% of part-time workers in Japan are women (Reynolds G. , Top Ten Slide Tips, 2014)
References
Reynolds, G. (2014). Top Ten Slide Tips. Retrieved from Garr Reynolds: http://www.garrreynolds.com/preso-tips/design/
Reynolds, G. (n.d.). Presentation Zen: How to Design & Deliver Presentations Like a Pro. Retrieved from http://www.garrreynolds.com/Presentation/pdf/presentation_tips.pdf
Reynolds, G. (n.d.). The Big Four: Contrast, Repetition, Alignment, Proximity. Presentation Zen: Simple Ideas on Presentation Design and Delivery. Retrieved from http://www.presentationzen.com/chapter6_spread.pdf