There’s a fine line between love and hate and there is a fine line between good and bad. I don’t speak to a large audience on a regular basis but it’s easy to miss the mood and needs of the audience.
For a technology conference internal or external you normally have a pretty dry subject so getting people to listen is difficult (they are on their phones reading or communicating or writing blogs, like this one).
Too many slides aren’t good. Slides themselves are fundamentally bad as you can’t change track during the session if it’s not going well. You can simply stop using the slides but the safety net isn’t there and you can argue you shouldn’t have used slides in the first place.
Watching other presenters should be a good way of becoming a good presenter either learning what works and what doesn’t. However many people just repeat the same mistakes when they get on stage. Blinded by the lights maybe but more likely unable to break the normal low level of expectations
When you have to sit through 4 days of this style of presentation you think that people would learn. If you are in a sales organisation you think that presenters would be good a selling. That they sometimes aren’t says as much about the sales process as the presenter