I’m not a fan of PowerPoint or any other slide software—especially when they feature long bulleted lists that benefit the speaker more than the audience.
I am a fan of flipcharts and whiteboards—I write as I go. Perhaps it’s my bias as a former university teacher, but I like writing, and eschew pre-packaged slides.
I’ve seen slide decks from Seth Godin and Josh Linkner that I thought were beautiful accompaniments to their speeches. The slides featured either gorgeous pictures or funny commentaries on what the speaker was saying.