Hiya, newbie here! I mainly use 'em for TinkerCad, as I'm trying to essentially make toys and figurines for 3d printing, stuff like really simple figures with Star Wars-type articulation, using the program and I think CC0-type models are really useful as a basis. Of course, I have problems with some of the DAZ/Poser-y models because I have no idea how to work those programs or convert models, hell I barely even know how to use Blender; or at least the chunks of it that I need; but I'm trying to work through it.