Ok here are some links to help with that whole fleshing out your characters. Hope they help and also look at some of my random generator link lists for more on finding names for people, places and things.
Vintage names – need an old fashion name for a character who is over 100 years old or just for someone from an older time or someone named for their great great grandmother or father? Check out this blog entry on nameberry.
Character Quirks – Need a quirk or trait to help flesh out one or more then one of your characters. Take a look at this blog entry from Anthony Owens. He lists 50 Normal Traits/Quirks there. Part 2 of that list is also there listing 50 extraordinary or supernatural quirks or traits.
Personality Traits – Ever had a problem with finding a personality trait for your characters? Maybe you can think of all the good ones but not any bad ones. Well this article lists both the good and the bad.