You're going to love this, Suzi. I'm afraid I don't agree with you. I subscribe to the crystal goblet school of design - like a crystal wine glass, the design of something should be beautiful in itself but hardly noticeable by the reader. This comes from an essay by Beatrice Ward - see
http://www.nenne.com/typography/crystalgoblet1.html for full details - but the point is that to decorate something is to hide it.
It is also very difficult (especially with presentations) to avoid irritating people. The whizzy breaking sound on slide 15 might truly be witty and funny, but if your client has no sense of humour, it's not going to help your cause.
I'm sure presentation was great, but I would say that uniform slides, documents, figures etc all make a company look together and professional.
Bethalize
Peer Moderator