.: Meri :.
🍓 strawberry time 💞
I'm not super familiar with any, but I think they're a cool concept—though I admit the "VTuber companies" thing kinda goes over my head, and I don't really know much at all about that aspect of it. ^^; But I've watched some of temmie's livestreams before, and she uses a rig she made herself of her persona, which is really cute and well-done! I don't think face cams are necessary in streaming or videos, but the VTuber avatars can be a fun alternative anyway.
As for the more character-based VTuber stuff... I've never watched any of the original character content like Kizuna Ai or Hololive or any of that, but I've watched a few official VTuber videos where the actual voice actors of pre-existing characters do silly motion-capture stuff with rigs of their characters. I remember a couple years ago the official One Piece Youtube channel did a few VTuber videos starring a few of the Strawhats/their Japanese VAs that were really fun!And yes I've also watched some official otome-game-based ones along those same lines.
As for the more character-based VTuber stuff... I've never watched any of the original character content like Kizuna Ai or Hololive or any of that, but I've watched a few official VTuber videos where the actual voice actors of pre-existing characters do silly motion-capture stuff with rigs of their characters. I remember a couple years ago the official One Piece Youtube channel did a few VTuber videos starring a few of the Strawhats/their Japanese VAs that were really fun!