Here's one of my pet peeves.
I keep seeing this and I don't get it. (FOR ME) It feels out of place and it suddenly just JUMPS to an odd pose compared to the rest.
Consistency was the word I was looking for. Because the game makes the characters jumps to poses for every note (and assuming in quick succession), Keeping it simple makes it easier to read.
Also, personal preference. For beatboxing, I think it's better if it's the left one since the mouth movements are more synced to the beat, rather than the right one since it's mouth movements are delayed by one frame to do the "B" sound.
Also LET THEM ACTUALLY USE THEIR MICS LIKE WHAT?? WHY DO SOME OF Y'ALL DO THIS?
It's like holding someone else's chocky milk while they go do something and you just have a glass of chocky milk in your hand that you don't drink.
(What the heck was that comparison lol?)