I have really enjoyed reading this thread . . .
I was just certified in March, so everything is new, but here were a few of the bigger surprises to me:
I can scream with a reg in my mouth
Unlike many land creatures, bright colors on fish do not necessarily indicate danger
Unlike many land creatures, sea creatures are much more curious and will actually swim up to you to check you out and follow you around
I learned
. . . to stick by your bc on a boat before someone else (who didn't bring one on the boat) jumps in the water with it (it was a rental and my first boat dive)
. . . it is possible to get stung by a jellyfish you never saw coming (first night dive)
. . . urine does not make jellyfish stings feel better (someone else opted for this treatment plan)
. . . there is a lot that can go wrong on a dive
. . . just because someone checks the box about not having any mental impairments, doesn't mean it's true
. . . hoods @*%$
. . . everyone looks like the Michelin Man in a 7mm
. . . when I can see my buddies fins, but not his head, that is low vis
. . . depth gauge is even more important to pay attention to in low vis since there are no visual cues for new divers who don't yet know how their decent rate/per equalization (if that make sense to anyone?)
. . . even blue gills can bite
. . . some u/w cameras (NikonosV) come with more o-rings than an engine and require tender loving care
. . . situational awareness decreases with camera in hand
. . . if you jump into a school of minnows at night, its not them you need to fear, it's what chasing them
and having a great buddy is, well, priceless.