It might be a bit lengthy and a UI challenge on smaller screens/interfaces but I hate pronouns and unnecessary thinking, I'd prefer Current User Documents (or Current User's Documents) and All Documents. Sometimes I might be logged in as my personal user, sometimes as Admin, sometimes as one of my children. "Your Documents" or "My Documents" makes me hit the brakes in whatever I was trying to do/look for to figure out "who am I" [logged in as].

Edit: Actually it should be "[Username]'s Documents" not "Current User's Documents" otherwise I have to stop to remember who I'm logged in as...