lol I just answered this same question on another board.
My favorite exercise for develping power (assuming we are talking lower body) is whatever triple extension exercise that fits the needs analysis of my client. No two exercises give the same benefits or have the same carry over to function.
I am a USAW Coach so I tend to lean towards the Olympic Lifts, but I also like to do accomidated resistance training speed work as well (westside method).
Plyometrics are good as well but most people aren’t strong enough to get the full benefits from the myotatic reflex associated with it. It doesn’t do somebody any good to train the nervous system to react then not have the strength to follow through..this is detrimental to speed strength/power. A good rule of thumb here is if you can squat 2 times your body weight then you can the best benefit from intermediate and advanced plyo work.
It is important to remember that power has a time component and you want to be able to move the resistance fast but still get enough of a load to train the fast twitch fibers. This is normally done around 40-50% 1RM and as explosive as possible.