Recent first? Hmm, I put my fins on a cattle-boat in Thailand last week. I'll write up my "experiences" from that in detail in either "whine and cheese" or "basic scuba discussions" later, but despite having been diving for longer than I care to admit, it was a first for me.
There were pro's and cons: the "pro" was that the i-responsible DM on board said "so you're an instructor, right, that means I'll just let you do your own thing and not follow the group". Yes, I do do solo-diving, but in general only in sites I know and with a tad more redundant equipment than just an AL80. Now, that still turned out to be a "pro" since the i-responsible DM then shephearded his flok out on a succession of subsequent dive-profiles which could only be designed to try and get as many as possible bent and/or OOA at depth. Clearly obvious once in the water, I waved goodbye, and did some saner solo-stuff (top-of-the-reef things -- uhh, pretty fishes ;-) ), and had a blast, only to return to the boat and look in awe to find the i-responsible DM trying to get his flok out of unplanned deco with what air they (and he) had left.
It later turned out that the flok consisted of fresh-out-of-OW-factory divers....somehow, they got away with only extreme post-dive-fatigue and only two OOAs -- and an explanation that "it's normal to be tired after a dive"...
Ohh, another first: I didn't go on the second day of diving as I had planned, but went to the beach instead -- I've never turned down diving before, but the beach seemed more fun than being an accessory to trying to bend people....
And a third first: I swore never to go back to that cattle-boat. Actually, I'd like to swear to stay off cattle-boats and make this "first" a "last" too, but that'd probably be pushing it a little...
Yup, I think the detailed report should go to "whine and cheese".....