I have a West German working line dog. Outside, he is a somewhat busy dog, but indoors this is the usual scene -
A dog from show lines would be a great running and hiking buddy (after they are fully grown; same for working lines). A dog from working lines would be, too. Mine is a wonderful companion and an expert at holding down the couch/bed. All of my future dogs will also be pets first and foremost, but most, if not all, will be from working lines.
Trent - 2/20/09 German Shepherd Dog
Bree - 2/11/08 Tuxedo DLH Cat
Raina - 8/12/11 Black Smoke DLH Cat