daryl:
• chew on his shirts when he's hungry
rick
• he bites his nails but lets one get long so he can tap on things
carl:
• tries to be double jointed and force his fingers different ways
• tries to braid his own hair
ron
• tries to breathe in a pattern and starts choking
glenn
• curls his own eyelashes with his fingers
maggie:
• when shes bored she'll lace and unlace her shoes in different ways she made up
michonne
• when its quiet she clicks her tongue and makes mouth noises