I think the instructors that have taken there ego's out of the game seem to roll with there students. The Jiu Jitsu game is so huge that you have to work all aspects to become better and different weight classes help that. When i'm rolling with guys that I can over power my focus is on transitions without force. If i'm rolling with larger guys my focus is on constant movement so they can't set up there weight. I love Jiu Jitsu for the chess match and the flow... tap and no tap I love the game either way :-)