I created an account for the 2nd one, got as far as voting on themes and watching the intro stream on the 3rd edition… hopefully this time an actual game will result. (I know I can do so, I've done a few LDjams.)
Normally I jam with my own (terrible!) C++/SDL ad-hoc engine, but this time seems as good as any to break with what has become too much of a tradition. So, I'll be dithering in & futzing with Game Maker Studio 1.4 this time around, unless an idea comes along that screams for another method.
Have to say; while I'm always more upbeat about themes than most (or so it seems), this shortlist seems especially nice. Can't think of a single one that I even vaguely dislike :-)
Good luck all!