No11 makes some interesting comments that I completely agree with. I've always felt that catcher is the hardest defensive position to play well. I also think it is the most important one, with all due respect to shortstops. Your catcher is in on nearly every play in a game, and has more responsibilities than any other position on the field. Many people, including coaches at lower levels, don't realize how truly important having a quality catcher is to the success of a team.
Ever wonder why so many managers in pro ball are former catchers? They learned and understand the game better than most position players. Don't even bring pitchers into that discussion.