>>1832293Not him but if I had to guess a few, I suppose for example:
-MMD videos with bare minimum or lazy shader work (black edge outlines on model still visible for no reason, a common example)
-tons of clipping in the motion. Making it obvious that the user simply loaded the motion into MMD without adjusting the model's bones for clipping issues.
-no expressions in the motion. Stock smile and unblinking eyes.
However, videos with these characteristics still can get many more views and/or likes, because it has dancing naked girls of popular waifus. Kancolle girls are all the rage right now. Toehoes were before that too.
Basically MMD users that cater to a specific audience and never actually improve their MMD techniques. So long as they keep making videos of naked waifus, they're good to go.