As a person of profound hearing loss from birth.....
Unbeknownst to me, I developed tools to cipher dialogue.
I play poker like a wiz

Anyway, I try and gather other "signs" to discern what people are saying, I really do.
Hillary is giving thanks, for some kind words spoken to her by Michele.
It is a gesture you see often in Asian cultures.
B2, he is a clown.
His smirk, has always been a constant companion. Its not meant to belittle, or disrespectful.....
But more a display of bemusement to life.
I would venture a guess he acquired this as a child, for defensive purposes.
Perhaps he was told to act more like his brother

Now Bill.....
Those are eyes of contempt.
I would bet the ranch on it.
The squinting eyes, and tight mouth, taunt face muscles, signals to me he is struggling to hold in his natural instinct to strike first, and set the tone, and temper, of a conversation that he would rather not entertain....
He is still thinking Michele should serve him coffee