CHA 7 PC Rocked!
When I DM, I usually have my players roll their stats. In a recent campaign, the Urban Druid had a 7 Charisma. The player decided her character didn't know that he was socially inept. She was constantly having the character step in whenever Charisma was in play. It was hilarious.
For example, when the elf rogue failed to charm the bartender for information, the Druid stepped in, saying "Let me handle this...." Of course, the fact that she almost always failed allowed for some fun and good roleplaying.
That was a Great Character.