[Captain.Remy]

Originally Posted by Tom

Shahbaz- obvious reasons
Nikki- anorexic, OCD and generally unstable
Lea- Body dysmorphic disorder (its why she had so much surgery)
Pete- Tourettes
Sam- Gender issues and generally unstable

Probably not considered as mental issues but still:

Dawn - No social skills, isolated from the rest of the world, total freak.
Jayne - Lack of manners and how to act in public.
Susie - Gold digger.
Aisleyne - Disgusting behaviour, a complete ghetto trash.

As for the rest, they were pretty much normal.