Before my upgrade i saw some hilariously bad briefings by Captains. The best was going on a DOH, the guy spent 20 mins, i kid u not, briefing on how to board the bus yadada. Bored the tits off me.
I've heard from Cabin crew of one guy recently asking them pass or fail questions, i thought that was the pursers job. Then this whole process made them late at the aircraft, tosser.
Most and i mean most do great briefs, short n sweet. I now delegate that its the pursers job to get all the cabin crew to visit the f/deck for team buidling purposes
Thats an operational reason in compliance with the FOM.
EGGW