Aries: Always running in the opening

Taurus: The food maniac which every anime at least has one of 

Gemini: The sudden yaoi scene 

Cancer: The dead parent

Leo: The childhood flashback while being in an intense battle

Virgo: The tsundere

Libra: Magical transformations 

Scorpio: Perverted boy/girl

Sagittarius: The beach episode  

Capricorn: The glasses thing

Aquarius: FAN SERVICE

Pisces: In the back of the classroom behind the window table