Apply design to a presentation means communicate, not decorate.

If it is fashionable but doesn’t help the audience comprehend your message… ditch it!

If it is fashionable and does help the audience comprehend your message… go for it!

If it is timeless (and so always in fashion) and does help the audience comprehend your message… even better!

Mind the wow effect. In the early nineties we had Gothic fonts, very wow, but not readable. Then it was the turn of gradients… and so on.

Introduction and disclaimer are here