Ego v Heart
Good PowerPoint design is nice, but not necessary.
When it comes to designing a presentation, ask yourself this:
Are presenting from your ego...or performing from your heart?
When you present from your ego, you are concerned with looking good (or avoiding looking bad). You put a strong focus on trendy design details.
When you perform from your heart, you reflect on how to emotionally connect with your audience. You put your focus on building a relationship with them.
Think about that the next time you develop a PowerPoint presentation. What's important to your audience? And what do you want to achieve?