concerning the height of the glass:
 
It seems to me that the higher the glass, the more prone the players will be
to use it to bank shots out of their zone and, thus, the more 3-dimensional
the game becomes.  However, I don't know that this would be a noticable
difference if the glass were an additional 2 or 3 feet higher.  Has anyone
who's witnissed a 'high glass' game noticed any difference in style of play?
 
Jeff