There was this sitcom I believe was on the FOX network, in which the main character's conscience was made up of three or four people that lived inside of his mind. There was a woman (the caring side), the bookworm( the thinker), and the slob. Does anyone know the answer?

Sounds like Herman's Head (http://www.imdb.com/title/tt0101115/)

I agree with Robert260 - I used to watch it too... I don't think it was on for long...

Hermans head