These are things that I have noticed in presentations given by others. Presentations that I have liked have these qualities.

1. Less text on the slide. Just pointers not descriptions. A person viewing should be able to skim quickly. This is not a SOP document.
2. Have a demo. Demos are fun.
3. If you include diagrams, it should be visible, i.e. the text should be visible.
4. Consistent design language, don’t jump from one style to a different one. I prefer minimalist styles.
5. Do not dive too deep technically - depends on the audience actually
6. Pick a topic accordingly. A super technical presentation will be difficult to pull off. Generally speaking, it’s easier to do overview sort of talks.