An effective presentation can be informative and mind opening but it can also be funny and intriguing. Every speaker I've seen who tries a joke that they have planned out and use it for every single presentation and even they have gotten so tired of the joke they force themselves to laugh at it instead of having a natural reaction. For me a motivational speaker needs to be dynamic and re-invent themselves after every few presentations. They can still portray the same emotions and provoke the same thoughts but to stay relevant and stay effective, they have to tweak some elements of their presentation. To engineer a presentation that provides a message that hits everyone is virtually impossible so trying to please the masses of the listening group is vital. Another part is to judge your audience, if they seem interested or moved by the words then keep going but stick to a max time limit, if somebody has an eyeopening presentation, the show should go on. There are amazing things that get cut short by time but if you have a presentation that doesn't hold the attention of the masses, cut it short once you hit your point. I'm not saying just mic drop and walk out but like have a shortcut to the end so you can end the presentation quick. Stay on topic, and don't linger on one part of your story or proposal for too long. The amazing thing about humans is if they are getting paid enough; they care but don't push their attention spans to the limit, keep moving through the presentation. Talk to the audience, not an individual move your attention to the crowd don't single one person out. It really just makes it awkward for both of you and the longer that you do it the harder it is to break it. A informative presentation can be engaging too so long as they aren't reading. Anyone would rather glance at an infographic than read a slide from a board. But like idk i suck at public speaking anyway so I can't really roast anyone who can speak to a crowd.