Aries: toothy smiles and biting nails.
Taurus: messy eating.
Gemini: bantering and talking to oneself.
Cancer: whining at small things.
Leo: twirling hair.
Virgo: drumming fingers.
Libra: giggling at themselves.
Scorpios: glaring when concentrating.
Sagittarius: moving legs around.
Capricorn: clicking pen.
Aquarius: grand hand gestures.
Pisces: doodling and staring into spaces.