Greg
Reduced Agility: -3 (especially when the pressure is on). Examples: drops his dad's architecture plans during his job as a bike deliverer, not as good a driver as he'd like to be, wipes out on a surfboard in front of everyone.

Marcia
Vulnerability: +4 to be hit in the nose AND/OR double damage to the nose.

Peter
Mute (variation): Every turn Peter spends singing, he must save vs. Endurance d100 to prevent his voice from cracking. Also, his Humphrey Bogart impression is unrecognizable, and he spoke with a lisp after getting punched in the jaw by Buddy Hinton.

Jan
Phobia/Psychosis:  Obsessed about her appearance and social status, Jan must save vs. Charisma (d20) once every 1d6 weeks or take extreme measures to reinvent herself (buy a wig, invent an imaginary boyfriend, etc.)

Bobby
Phobia/Psychosis: Bobby may go to extreme measures to prove that he is as competent as anyone else in the family and has a rigid interpretation of rules and regulations: "Mom always said, don't play ball in the house." Getting promoted to safety monitor at school goes to his head.

Cindy
Special Requirement: As the youngest girl, Cindy must wear her hair in curls until her mid-teens.

Oliver
Prejudice: deemed a jinx, blamed for the downfall of the Brady series, made Jan look popular by comparison.