Power pitchers are the kind that fans love to see. They are excited by fastballs that light up the radar gun and pitches that rack up the strikeouts.
It's not hard to find a pitcher throwing 95-plus MPH anymore, but it isn't quite as easy to find someone that throws that hard and is also able to control his stuff and pitch effectively.
The Mets have a few of those types of arms currently rattling around their minor league system and some of them have real promise. If some of these pitchers can continue developing and learn to harness their fastballs, the Mets will have a very talented staff in the future.