In some ways I agree with LeRoy that my own presentations are my favourites, but only from the point of view that I love presenting. Therefore, any of my presentations where no-one got up and walked out, and then I got several interesting questions at the end are my favourites, as it confirms to me, as the presenter, that I got it right! There is probably a "theatre actor" hidden somewhere inside me that loves the challenge and thrill of an audience, and the warm feeling I get from that audience appreciating what I've presented.