Most important is a speaker who is confident and knows their stuff. Someone who can grab the audience's attention and hold it. I want a short presentation. I want to be told relevant, salient facts. But that doesn't mean it has to be dull.
Jokes are good.
And all this can be done without any computers at all, if you like. Sometimes, though, there is value in providing visual aids, especially if trying to communicate data. I don't object to that. What I do object to is sticking to a formula, just because that's what everyone else does. Next time you think that you have to give a presentation, think first about the object of the meeting.