Not as great as I was hoping they'd be, but there's a couple that I think I'd enjoy. I'd be very keen to do 3 colors, mainly because I suck at pixel art and I'll be using pico-8 so it'll help restrict me even further in terms of graphics.

"Games that shouldn't be in first person done in first person" I find way way too specific. From what I can tell, this is basically restricting every game to be 3D and in first person. Yeah, it could result in some really cool games, but for people like me who don't make 3D games and are restricted to 2D engines (GMS2 and pico-8 in my case), then it basically means I can't compete in this Ludum Dare. I know I could just learn how to use Unity, but with only 3 days left, I don't want to learn an entire new engine just for one game jam.

"One item, many uses" also peaked my interest. I don't know what kind of game I'd make, but I can see this theme resulting in some really interesting themes.