It doesn’t matter if your slides are plain or not. No one ever thought a talk was good because of how nice the slides’ design was. What matters is having something actually worth giving a presentation about and presenting it effectively, which is all about your delivery and what you put on your slides (good: pictures, diagrams, etc… bad: walls o’ text).
Walls of text too often come with the monotone recital of that very text. But if you’re lucky, the speaker mixes up the order of bullet points or even forgets one which helps you keep your mind engaged and stay awake.
