I rarely use Power Point while lecturing.
I will use it as a review tool and they are posted on a dropbox for the student to review at their convenience.
I know of one instructor that uses it exclusively. Students get bored and when I have subbed for that instructor I have used his PPT but will enhance it with worksheets as classroom activities and the students get so much more out of it.
Thank God for YouTube! I use it almost everyday in some classes to demonstrate surgical procedures that can not be recreated in the lab.