Correct me if I am wrong, but I have always considered a satchel to be anything resembling a doctor's bag. Basically a bag with 1(or in some cases 2) handles that are worn/carried on the lower arm.
And mine is a baguette. The Fendi baguette. Mostly because it is so feminine but yet the hardware is bold, and I love the relaxed shape. Second and third are tight with clutches and hobos. Hobos so I can carry my life in my bag, clutches so I can look put togehter in a heartbeat(especially when I carry one in my hobo-which I often do-for emergencies)