(I thought Bb in the 90's was the original shout key...then in the 2000's we switched to Ab...making Eb the 3rd shouting key...)
My rules are:
-Don't shout too fast, don't shout too slow...
-Follow the MD, whoever is leading
-dont stay on your "breaks" too long...drive it, then go into a break, go back to drive... do another break, then another, then drive...
-dont be cute with it, if you gon bump em, bump em
-make sure everyone plays the same breaks...
-drummer must watch whomever is leading...
Those are my "rules"