I find myself handling a lot of underwater rules, adventures, and such these days. The work I did on the nearly-all-underwater adventure for the Ruins of Azlant adventure path has turned into some other editing/writing work for underwater adventures. I don't even particularly like encounters underwater as a player (because of my dwarf that drowned in a still bay all those years ago, Greg), although I've had a lot of fun with them as a GM.

And I foresee more of it: my Kingmaker players are about to go on an underwater excursion, and I've got a partially-underwater product in mind for Run Amok Games, too. So I won't be surfacing from this deep dive anytime soon!