I watch Mad Men. I love Mad Men. In fact, I may have blogged about this character exercise before, which is inspired by Mad Men. Mad. Men. No, I don't have a problem with repetition. Not at all.
Every character needs to have a public life, a private life, and a secret life. For example...
Public Life: He's a successful dude at an ad agency. He's a creative genius, mega-sexy. He's smooth. Admired by many. People want to please him.
Private Life: Cheats on his wife. Now divorced. Has, um, ladies of the night visit his apartment.
Secret Life: Who is Don Draper? Where did he come from? How did he grow up? He keeps these things a secret. His past is one, big question mark right now.
Try it out on your characters. It'll deepen them a bit. I'm working on this with Melody. There's more to her, I know it. I just need to dig a little deeper as I edit.
Also! I got a new computer. Now my writing is all organized and such. Makes me feel a bit better without the mess that was my old hard drive.