Same. I've got a couple of folders in my ~/Documents titled "Other".

Also, if you have projects with lots of parts, and you've got a 3D printer: have you discovered Gridfinity? (or others like Multibuild?) For the uninitiated, these are wall/drawer 42mm grids, in which you place bins that are multiples of 42. So you get perfectly-sized Tetris-like drawers and walls.