I do a lot of KeyNote presentations and also interactive presentations and standalone looping presentations.
There is one thing I really miss in KeyNote that I would suggest Apple to add.
When you do a standalone interactive presentation using hyperlinked buttons to take you to different slides and run them in automatic mode, there is one feature missing. You can only assing directions to a object in the slide. There is no way to direct a slide transition to any other place then the next slide.
It would be very useful, when I set the transition to be automatic, to point back to i. e. the menu slide. Or open a second keynote presentation.
MacBook Air, OS X Mountain Lion, 2,13 GHz Intel Core 2 Duo, 4 GB RAM