Extroversion (3.5e Trait)
From D&D Wiki
You are the life of the party, outgoing and fun loving, but somewhat blunt.
Benefit: You gain a +1 bonus to Charisma-based checks when dealing with more than one creature.
Drawback: You suffer a -2 penalty to Charisma-based checks when dealing with one creature.
Roleplaying Ideas: Characters that are extroverted tend to be natural born leaders, everybody's friend and the type of person that people want to hang around. They often participate in team activities, including sports and parties and try their hardiest to be the best company they can be. It's not rare for such an individual to be the spokesperson of their party or the leader of an organization.