Scuba Brad:
Why don't we move on from Mask Buckets, and see if there is any other suggestions on things you like and don't like.
My suggestions ----
Space is limited
.... don't spread your gear all over the place
.... don't bring onboard monster rubbermaid tubs or non-collapsible suitcases
Respect other peoples time
..... show up for check-in on time.
..... if the plan is to do a 1 hour dive and move to another site, don't surface 90 minutes later.
One hand for the boat
..... it doesn't matter how much of an old salt you are, sudden unexpected rocking of the boat can dump you.
Listen to the dive briefing, or at the very very least, don't talk so loud that others can't hear it. If you don't listen to the dive site briefing, don't complain when you hit the water and swim away from the reef or wreck.
If you were the one and only one to see the whale shark, just keep your mouth shut. Unless you have photos.
Bungie your tank in place and make sure other gear is secure. Falling tanks both injure people and destroy gear.
When casting off and returning to the dock, stay out of the way of the crew. Often they have a routine, and helpful divers end up just getting in the way. OTOH, be ready to lend a hand if requested.
Turn off cellphones. I like the boat briefing of one Captain: "Don't worry, if your cellphone rings while you're diving, I'll just motor over and drop it down to you".
Kick back, relax and enjoy.