I have to share this blog post by Laura Bergells at Maniactive because, while I've said something similar so many times, I could never say it as well as she does!
Your PowerPoint is not your presentation. No matter how many times we reiterate this, there's always someone who wants a copy or a conference who requires it as a handout. Here's an excerpt from Laura's article on her perspective:
"Seriously. Be a polite audience member. Never, ever ask a presenter for his or her presentation. (Not unless the presenter offers it to the audience as a download or CD or print out first. I sometimes do this after a 6 month run.)
If you like my presentation, I'm flattered. Really.
But my PowerPoint slides are usually props for my speech.
Would you go up to a juggler and ask, 'Neat act! May I have your balls?'"
Read the whole post here.