I love F & H, and it also fits in with my premise that great comedy comes from the 'trapped' scenario.
Plus - great comedy is never afraid to dip into pathos. It's a very fine line, but it can be walked successfully by the best actors and writers.
An example is the Meldrews, who in all their series, made one and one only, reference to their son who had died in infancy, it was a very poignant moment - but it was never mentioned again.
A little glimpse under the surface of characters like that is what makes such writing and acting so wonderful to enjoy.