Ok here is one that might be a LITTLE overpowered... but I'll try.

-Mugger (Req: Pickpocket of 3 likely): When speaking to someone you get the option to steal from them in a conversation without anyone seeing. It is less efficient but is a safer way to steal key items.
-Speed Drinker: Unlocks an ability that gives you a free action to quaff a potion (Whether it be healing or resistance).
--Alternatively this could not work with healing potions
-Bottletoss (Scoundrel): Allows you to throw potions in battle as if they were grenades.
--Alternatively this could work only with negative potions and poisons.
-Social Grace (Persuasion): Once per conversation you can recover from a failed persuasion roll, allowing you to try again.
--Alternatively: Failed persuasion gives a grace period to escape before combat occurs, allowing one to escape.