most effective presentation

I have learned so much in my edtech class. I really appreciate it when i learned something new form my teachers. It feels like i am two or three steps ahead of my co-teachers (hehehe). I have learned how use power director, moviemaker and creating a blog. its self-fulfilling when i have made a powerpoint presentation that won in the district competition (and hopefully will win in the division level).
The question now is, which is the most effective? For me, it is better to use power point presentation in class. It is not that time consuming like preparing power director and moviemaker...