Is the game better played with the same group of people/ levels of awareness or better to mix it up?

As with most games it is most fun to play with others that are at the same level.  The games flow faster and with more ease when this is the case.  The game is more fun for newcomers when a person can facilitate the game.  In otherwords one person who knows the game well can help others learn the multi dimensional nature of the game at a faster pace and with more ease.  Playing the game with many levels of awareness of the game and or self-awareness of the individuals is indeed possible and could actually open the door for deeper learning for all.  So all good.