Which side of the pitching rubber is best?

The title of the post is a question I sometimes get from pitchers, parents, and coaches.  As you will see in the video, most pitchers naturally gravitate towards one side or the other.  Unfortunately, most pitchers probably will not be able to explain why they are pitching off that side of the rubber.  They just do.  

If a pitcher is struggling with command, sometimes an adjustment on the pitching rubber might be an easy fix.  Watch the video to see why this might help.