Some things I think about a lot:
Bill saying if Arthur’s hair grows any longer he'll have to put a dress on him
Bill being tied up in that way when Arthur saves him from bounty hunters
Lenny getting praised by Bill
Karen saying Arthur is more kissable without the beard
One of the girls (I THINK IT'S SADIE) suggesting Arthur wear pig tails when his hair is long
Micah making himself crack up calling Arthur Santa Claus
Javier sitting there while Bill gushes about how scary he was that one time
All of Hosea and Dutch's camp interactions
Abigail telling Molly that she understands ("Unfortunately, I do")
John rejecting Jack wanting to play, and in chp 6 actively playing with him
Pearson's interaction with Mary-Beth
Tilly and Mary-Beth's friendship
When Dutch and Grimshaw dance
Karen "I'll scratch your eyes out before my coffee" Jones and Charles just accepting that